1.
Charter Arms Bulldog
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The Bulldog is a 5-shot traditional double-action revolver designed by Doug McClenahan and produced by Charter Arms. The Bulldog has been available for the.44 Special and.357 Magnum cartridges and it was a top-selling gun during the 1980s and it is considered to be Charter Arms trademark weapon. It has been produced by four different companies since it was released, designed by the founder of the first version of Charter Arms, Doug McClenahan, the Bulldog was released in 1973. It was one of the weapons of the 1970s and the 1980s in the United States. Its design and execution, which were modern at the time, caught the attention of the gun press. By the mid-1980s, more than half a million units had been produced, Bulldog production has been stopped a few times since 1992, when Charter Arms went bankrupt. Some time later, manufacturing began again under the Charco trademark and this company also filed bankruptcy, and the models produced during this period showed obvious production flaws. It was produced again by Charter 2000, this company, which failed also, improved the weapon with a barrel, front sight. The original model had no ejector-shroud and the front sight was soldered to the barrel. In June 2007, a version of the Bulldog with new features began to be produced by company named Charter Arms. Like most Charter Arms weapons, the Bulldog is an inexpensive yet serviceable, no-frills. It was designed to be concealed easily because of its small size, the Bulldog has no sharp edges to contend with when carrying the weapon in a holster or a pocket. Its trigger pull, in single and double-action modes, is quite light. If a large quantity of residue piles up inside the revolver because of usage, the cylinder cranes axle screw can be removed. Most critics believe the best use for the Bulldog is self-defense, the accuracy of the Bulldog is aided by its trigger pull. According to reviews, it is more accurate than expected for a revolver of its size and type, when the gun is fired, the hammer does not actually strike the firing pin. Under normal firing circumstances a small bar is raised as the trigger is pulled. The falling hammer strikes the transfer bar, which in turn strikes the firing pin, if the trigger is not being pulled when the hammer falls, the transfer bar will not be in position and the weapon will not discharge
2.
United States
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Forty-eight of the fifty states and the federal district are contiguous and located in North America between Canada and Mexico. The state of Alaska is in the northwest corner of North America, bordered by Canada to the east, the state of Hawaii is an archipelago in the mid-Pacific Ocean. The U. S. territories are scattered about the Pacific Ocean, the geography, climate and wildlife of the country are extremely diverse. At 3.8 million square miles and with over 324 million people, the United States is the worlds third- or fourth-largest country by area, third-largest by land area. It is one of the worlds most ethnically diverse and multicultural nations, paleo-Indians migrated from Asia to the North American mainland at least 15,000 years ago. European colonization began in the 16th century, the United States emerged from 13 British colonies along the East Coast. Numerous disputes between Great Britain and the following the Seven Years War led to the American Revolution. On July 4,1776, during the course of the American Revolutionary War, the war ended in 1783 with recognition of the independence of the United States by Great Britain, representing the first successful war of independence against a European power. The current constitution was adopted in 1788, after the Articles of Confederation, the first ten amendments, collectively named the Bill of Rights, were ratified in 1791 and designed to guarantee many fundamental civil liberties. During the second half of the 19th century, the American Civil War led to the end of slavery in the country. By the end of century, the United States extended into the Pacific Ocean. The Spanish–American War and World War I confirmed the status as a global military power. The end of the Cold War and the dissolution of the Soviet Union in 1991 left the United States as the sole superpower. The U. S. is a member of the United Nations, World Bank, International Monetary Fund, Organization of American States. The United States is a developed country, with the worlds largest economy by nominal GDP. It ranks highly in several measures of performance, including average wage, human development, per capita GDP. While the U. S. economy is considered post-industrial, characterized by the dominance of services and knowledge economy, the United States is a prominent political and cultural force internationally, and a leader in scientific research and technological innovations. In 1507, the German cartographer Martin Waldseemüller produced a map on which he named the lands of the Western Hemisphere America after the Italian explorer and cartographer Amerigo Vespucci
3.
Smith & Wesson
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Smith & Wesson is a manufacturer of firearms in the United States. The corporate headquarters are based in Springfield, Massachusetts, founded in 1852, Smith & Wessons pistols and revolvers have become standard issue to police and armed forces throughout the world, in addition to their popularity among sport shooters. Apart from firearms, Smith & Wesson has been known for the types of ammunition it has introduced over the years. Wesson founded the Smith & Wesson Company in Norwich, Connecticut in 1852 to develop the Volcanic rifle, Smith developed a new Volcanic Cartridge, which he patented in 1854. The Smith & Wesson Company was renamed Volcanic Repeating Arms in 1855, Smith left the company and returned to his native Springfield, Massachusetts, Wesson stayed on as plant manager with Volcanic Repeating Arms. As Samuel Colts patent on the revolver was set to expire in 1856 and his research pointed out that a former Colt employee named Rollin White held the patent for a Bored-through cylinder, a component he would need for his invention. Wesson reconnected with Smith and the two partners approached White to manufacture a newly designed revolver-and-cartridge combination, rather than make White a partner in their company, Smith and Wesson paid him a royalty of $0.25 on every revolver that they made. It would become Whites responsibility to defend his patent in any court cases which led to his financial ruin. The orders for the Smith & Wesson Model 1 revolver outpaced the production capabilities. In 1860 demand was so great that Smith & Wesson expanded into a new facility, at the same time, the companys design was being infringed upon by other manufacturers which led to numerous lawsuits filed by Rollin White. In many of these part of the restitution came in the form of the offender being forced to stamp Manufactured for Smith & Wesson on the revolvers in question. Whites vigorous defense of his patent caused a problem for armsmakers in the United States at the time as they could not manufacture cartridge revolvers, at the end of the war the US Government charged White with causing the retardation of arms development in America. Demand for revolvers declined at the close of the Civil War, in 1870 the company introduced a large frame revolver in heavier calibers than the pocket sized revolvers it had been making. The design was known as the Smith & Wesson Model 3, after an organized campaign by the NRA and NSSF, thousands of retailers and tens of thousands of firearms consumers boycotted Smith & Wesson. On 11 May 2001, Saf-T-Hammer Corporation acquired Smith & Wesson Corp. from Tomkins plc for US$15 million, Saf-T-Hammer assumed US$30 million in debt, bringing the total purchase price to US$45 million. The acquisition of Smith & Wesson was chiefly brokered by Saf-T-Hammer President Bob Scott, after the purchase, Scott became the president of Smith & Wesson to guide the 157-year-old company back to its former standing in the market. On 15 February 2002, the name of the newly formed entity was changed to Smith & Wesson Holding Corporation, about 2006 Smith & Wesson refocused its marketing on big box retailers, according to Smith & Wesson CEO Mike Golden in a 2008 conference call with investors. In December 2014, Smith & Wesson Holding announced it was paying $130.5 million for Battenfeld Technologies, the company made the acquisition with the eventual intent to merge all its existing Smith & Wesson, M&P and Thompson Center Arms accessories into a single division
4.
Cartridge (firearms)
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Military and commercial producers continue to pursue the goal of caseless ammunition. A cartridge without a bullet is called a blank, One that is completely inert is called a dummy. Some artillery ammunition uses the same concept as found in small arms. In other cases, the shell is separate from the propellant charge. In popular use, the bullet is often misused to refer to a complete cartridge. The cartridge case seals a firing chamber in all directions excepting the bore, a firing pin strikes the primer and ignites it. The primer compound deflagrates, it does not detonate, a jet of burning gas from the primer ignites the propellant. Gases from the burning powder pressurize and expand the case to seal it against the chamber wall and these propellant gases push on the bullet base. In response to pressure, the bullet will move in the path of least resistance which is down the bore of the barrel. After the bullet leaves the barrel, the pressure drops to atmospheric pressure. The case, which had been expanded by chamber pressure. This eases removal of the case from the chamber, brass is a commonly used case material because it is resistant to corrosion. A brass case head can be work-hardened to withstand the pressures of cartridges. The neck and body portion of a case is easily annealed to make the case ductile enough to allow reforming so that it can be reloaded many times. Steel is used in some plinking ammunition, as well as in military ammunition. Steel is less expensive than brass, but it is not feasible to reload, Military forces typically consider small arms cartridge cases to be disposable, one-time-use devices. However, case weight affects how much ammunition a soldier can carry, conversely, steel is more susceptible to contamination and damage so all such cases are varnished or otherwise sealed against the elements. One downside caused by the strength of steel in the neck of these cases is that propellant gas can blow back past the neck
5.
.44 Russian
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The.44 Russian, also known as the.44 S&W Russian, is a black-powder center-fire metallic revolver cartridge developed by Smith & Wesson in 1870. The.44 Russian design marked the first use of an internally lubricated bullet in modern firearm ammunition. However, Gorloff had some reservations about the standard.44 S&W American chambering of the pistol which, Smith & Wesson did so by reducing the diameter of the.44 bullet to.430 and adding lubrication grooves to its base. This evolutionary improvement became an archetype, influencing future cartridge designs.44 American and produced a muzzle velocity of roughly 750 ft/s. As a result of changes, the.44 Russian generated a much higher chamber pressure of 12,000 copper units of pressure compared to the older.44 American round which generated only 6-8,000 CUP. To prevent the new ammunition from being fired in.44 American revolvers with disastrous results. In 1872, while in the US, Grand Duke Alexei Alexandrovich visited the Smith & Wesson factory to review the progress of the Russian order. The American gun maker made him the gift of an engraved presentation Model 3 valued at more than $400, over 131,000 S&W Model 3 revolvers were eventually sold to the Russian Army. In addition to the S&W made revolvers, Belgian, Spanish, the.44 Russian chambering became a hit in the domestic market as well, gaining a reputation as the first American revolver cartridge offering inherent accuracy. In time it set records, eventually becoming known as an established target round, enabling skilled shooters to achieve 3-inch groups at 50 yards, notable for the time. The.44 Russian was the precursor for two very important later handgun cartridges which were based on its design, the.44 Special in 1907, a number of ammunition companies still manufacture. Ammunition 200 grain lead round nose, flat point Additionally, Starline Brass makes new, unprimed cartridge cases in.44 Russian for handloaders
6.
Bullet
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The word bullet is a firearm term. A bullet is a projectile expelled from the barrel of a firearm, the term is from Middle French and originated as the diminutive of the word boulle which means small ball. Bullets are made of a variety of materials and they are available singly as they would be used in muzzle loading and cap and ball firearms, as part of a paper cartridge, and much more commonly as a component of metallic cartridges. Bullets are made in a numbers of styles and constructions depending on how they will be used. Many bullets have specialized functions, such as hunting, target shooting, training, defense, a bullet is not a cartridge. In paper and metallic cartridges a bullet is one component of the cartridge, bullet sizes are expressed by their weight and diameter in both English and Metric measurement systems. For example.22 caliber 55 grain bullets or 5. 56mm 55 grain bullets are the same caliber, the word bullet is often used colloquially to refer to a cartridge, which is a combination of the bullet, paper or metallic case/shell, powder, and primer. This use of bullet, when cartridge is intended, leads to confusion when the components of a cartridge are discussed or intended, the bullets used in many cartridges are fired at a muzzle velocity faster than the speed of sound. Meaning they are supersonic and thus can travel a substantial distance, bullet speed through air depends on a number of factors such as barometric pressure, humidity, air temperature, and wind speed. Subsonic cartridges fire bullets slower than the speed of sound and so there is no sonic crack and this means that a subsonic cartridge such as.45 ACP can be effectively suppressed to be substantially quieter than a supersonic cartridge such as the.223 Remington. Bullets do not normally contain explosives, but damage the target by impact. The first use of gunpowder in Europe was recorded in 1247 and it had been used in China for hundreds of years. Later in 1364 hand cannon appeared, early projectiles were made of stone. Stone was used in cannon and hand cannon, in cannon it was eventually found that stone would not penetrate stone fortifications which gave rise to the use of heavier metals for the round projectiles. Hand cannon projectiles developed in a similar following the failure of stone from siege cannon. The first recorded instance of a ball from a hand cannon penetrating armor occurred in 1425. In this photograph of shot retrieved from the wreck of the Mary Rose which was sunk in 1545, the round shot are clearly of different sizes and some are stone while others are cast iron. The development of the hand culverin and matchlock arquebus brought about the use of cast lead balls as projectiles, bullet is derived from the French word boulette, which roughly means little ball
7.
Grain (unit)
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A grain is a unit of measurement of mass, and, for the troy grain, equal to exactly 7001647989100000000♠64.79891 milligrams. It is nominally based upon the mass of a seed of a cereal. From the Bronze Age into the Renaissance the average masses of wheat, rather, expressions such as thirty-two grains of wheat, taken from the middle of the ear appear to have been ritualistic formulas, essentially the premodern equivalent of legal boilerplate. Another book states that Captain Henry Kater, of the British Standards Commission, the grain was the legal foundation of traditional English weight systems, and is the only unit that is equal throughout the troy, avoirdupois, and apothecaries systems of mass. The unit was based on the weight of a grain of barley. The fundamental unit of the pre-1527 English weight system known as Tower weights, was a different sort of known as the wheat grain. The Tower wheat grain was defined as exactly 45⁄64 of a troy grain.79891 milligrams, 7000100000000000000♠1 gram is approximately 7001154323600000000♠15.43236 grains. The unit formerly used by jewellers to measure pearls, diamonds, or other stones, called the jewellers grain or pearl grain, is equal to 1⁄4 of a carat. The grain was also the name of a traditional French unit equal to 6995531150000000000♠53.115 mg. In both British Imperial and U. S. customary units, there are precisely 7,000 grains per avoirdupois pound, the grain is commonly used to measure the mass of bullets and propellants. The term also refers to a particle of gunpowder, the size of which varies according to requirements. In archery, the grain is the unit used to weigh arrows. In dentistry, gold foil, used as a material to restore teeth, is measured in grains, in North America, the hardness of water is often measured in grains per US gallon of calcium carbonate equivalents. Otherwise, water hardness is measured in the metric unit parts per million, one grain per US gallon is approximately 6995171000000000000♠17.1 ppm. Soft water contains 1–4 gpg of calcium carbonate equivalents, while hard water contains 11–20 gpg, though no longer recommended, grains are still used occasionally in medicine as part of the apothecaries system, especially in prescriptions for older medicines such as aspirin or phenobarbital. For example, the dosage of a standard 6996325000000000000♠325 mg tablet of aspirin is sometimes given as 7000500000000000000♠5 grains, in that example the grain is approximated to 6995650000000000000♠65 mg, though the grain can also be approximated to 6995600000000000000♠60 mg, depending on the medication and manufacturer. The apothecaries system has its own system of notation, in which the symbol or abbreviation is followed by the quantity in lower case Roman numerals. For amounts less than one, the quantity is written as a fraction, or for one half, therefore, a prescription for tablets containing 325 mg of aspirin and 30 mg of codeine can be written ASA gr
8.
Rifling
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In firearms, rifling consists of helical grooves in the internal surface of a guns barrel, which impart a spin to a projectile around its long axis. This spin serves to stabilize the projectile, improving its aerodynamic stability. Rifling is often described by its twist rate, which indicates the distance the rifling takes to complete one revolution, such as 1 turn in 10 inches. A shorter distance indicates a faster twist, meaning that for a given velocity the projectile will be rotating at a spin rate. Barrels intended for long, small-diameter bullets, such as the ultra-low-drag, 80-grain 0.223 inch bullets, extremely long projectiles such as flechettes may require high twist rates, these projectiles must be inherently stable, and are often fired from a smoothbore barrel. Muskets were smoothbore, large caliber weapons using ball-shaped ammunition fired at low velocity. Due to the high cost and great difficulty of manufacturing, and the need to load readily from the muzzle. Consequently, on firing the ball bounced off the sides of the barrel when fired, barrel rifling was invented in Augsburg, Germany in 1498. In 1520 August Kotter, an armourer of Nuremberg, Germany improved upon this work, though true rifling dates from the mid-16th century, it did not become commonplace until the nineteenth century. The most successful weapons using rifling with black powder were breech loaders such as the Queen Anne pistol, the grooves most commonly used in modern rifling have fairly sharp edges. More recently, polygonal rifling, a throwback to the earliest types of rifling, has become popular, polygonal barrels tend to have longer service lives because the reduction of the sharp edges of the land reduces erosion of the barrel. Supporters of polygonal rifling also claim higher velocities and greater accuracy, polygonal rifling is currently seen on pistols from CZ, Heckler & Koch, Glock, Tanfoglio, and Kahr Arms, as well as the Desert Eagle. Such guns have achieved significant increases in velocity and range. Examples include the South African G5 and the German PzH2000, gain-twist rifling begins with very little change in the projectiles angular momentum during the first few inches of bullet travel after ignition during the transition from chamber to throat. This enables the bullet to remain undisturbed and trued to the case mouth. After engaging the rifling the bullet is progressively subjected to accelerated angular momentum as burning powder propels it down the barrel. By only gradually increasing the rate, torque is spread along a much longer section of barrel. Gain-twist rifling was used as early as the American Civil War, colt Army and Navy revolvers both employed gain-twist rifling
9.
Primer (firearms)
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In firearm ballistics, the primer is a component of pistol, rifle, and shotgun rounds. Early primers were simply the same black powder used to fire the weapon and this external powder was connected though a tube in the barrel that led to the main charge. As powder wont burn when wet, this led to difficulty, or even the inability, modern primers are shock sensitive chemicals. In smaller weapons the primer is usually integrated into the rear of a cartridge, in larger weapons like cannon the primer is a separate component placed inside the barrel to the rear of the main propellant charge. The first step to firing a firearm of any sort is igniting the propellant, the earliest firearms were cannons, which were simple closed tubes. There was an aperture, the touchhole, drilled in the closed end of the tube. This hole was filled with finely ground powder, which was ignited with a hot ember or torch. With the advent of firearms, this became an undesirable way of firing a gun. The first attempt to make the process of firing a small arm easier was the matchlock, the matchlock incorporated a lock that was actuated by a trigger, originally called a tricker. The lock was a lever which pivoted when pulled. The match was a burning fuse made of plant fibers that were soaked in a solution of nitrates, charcoal, and sulfur. This slow-match was ignited before the gun was needed, and it would slowly burn, after the gun was loaded and the touchhole primed with powder, the burning tip of the match was positioned so that the lock would bring it into contact with the touchhole. To fire the gun, it was aimed and the trigger pulled and this brought the match down to the touchhole, igniting the powder. With careful attention the slow-burning match could be burning for long periods of time. The next revolution in technology was the wheel-lock. It used a spring-loaded, serrated steel wheel which rubbed against a piece of iron pyrite, a key was used to wind the wheel and put the spring under tension. Once tensioned, the wheel was held in place by a trigger, when the trigger was pulled, the serrated edge of the steel rubbed against the pyrite, generating sparks. These sparks were directed into a pan, called the flash pan, the flashpan usually was protected by a spring-loaded cover that would slide out of the way when the trigger was pulled, exposing the powder to the sparks
10.
Smokeless powder
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Smokeless powder is the name given to a number of propellants used in firearms and artillery that produce negligible smoke when fired, unlike the black powder they replaced. The basis of the term smokeless is that the products are mainly gaseous. Despite its name, smokeless powder is not completely free of smoke, while there may be little noticeable smoke from small-arms ammunition, since the 14th century gunpowder was not actually a physical powder, and smokeless powder can be produced only as a pelletized or extruded granular material. Smokeless powder allowed the development of modern semi- and fully automatic firearms and lighter breeches, burnt black powder leaves a thick, heavy fouling that is hygroscopic and causes rusting of the barrel. The fouling left by smokeless powder exhibits none of these properties and this makes an autoloading firearm with many moving parts feasible. However, they are used as propellants, in normal use. Before the widespread introduction of smokeless powder the use of black powder caused many problems on the battlefield, Military commanders since the Napoleonic Wars reported difficulty with giving orders on a battlefield obscured by the smoke of firing. Verbal commands could not be heard above the noise of the guns, unless there was a strong wind, after a few shots, soldiers using black powder ammunition would have their view obscured by a huge cloud of smoke. Snipers or other concealed shooters were given away by a cloud of smoke over the firing position, black powder is also corrosive, making cleaning mandatory after every use. Likewise, black powders tendency to produce severe fouling caused actions to jam, nitroglycerine was synthesized by the Italian chemist Ascanio Sobrero in 1847. Nitroglycerine is also sensitive, making it unfit to be carried in battlefield conditions. A major step forward was the discovery of guncotton, a nitrocellulose-based material and he promoted its use as a blasting explosive and sold manufacturing rights to the Austrian Empire. Guncotton was more powerful than gunpowder, but at the time was once again somewhat more unstable. John Taylor obtained an English patent for guncotton, and John Hall & Sons began manufacture in Faversham, English interest languished after an explosion destroyed the Faversham factory in 1847. Small arms could not withstand the pressures generated by guncotton, Abel patented this process in 1865 when the second Austrian guncotton factory exploded. After the Stowmarket factory exploded in 1871, Waltham Abbey began production of guncotton for torpedo, in 1863, Prussian artillery captain Johann F. E. Schultze patented a small-arms propellent of nitrated hardwood impregnated with saltpeter or barium nitrate. Prentice received an 1866 patent for a powder of nitrated paper manufactured at Stowmarket. In 1871, Frederick Volkmann received an Austrian patent for a version of Schultze powder called Collodin
11.
Centerfire ammunition
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A centerfire cartridge is a cartridge with a primer located in the center of the cartridge case head. Unlike rimfire cartridges, the primer is a separate and replaceable component, centerfire cartridges have supplanted the rimfire variety in all but the smallest cartridge sizes. The stronger base of a cartridge is able to withstand higher pressures which in turn give a bullet greater velocity. Larger caliber rimfire cartridges require greater volumes of priming explosive than centerfire cartridges, reducing the amount of priming explosive would reduce the reliability of rimfire cartridge ignition, and increase the probability of misfire or dud cartridges. Economies of scale are achieved through interchangeable primers for a variety of centerfire cartridge calibers. The expensive individual brass cases can be reused after replacing the primer, gunpowder, the forward portion of some empty cases can be reformed for use as obsolete or wildcat cartridges with similar base configuration. Modern cartridges larger than.22 caliber are mostly centerfire, actions suitable for larger caliber rimfire cartridges declined in popularity until the demand for them no longer exceeded manufacturing costs, and they became obsolete. An early form of ammunition, without a percussion cap, was invented between 1808 and 1812 by Jean Samuel Pauly. This was also the first fully integrated cartridge, true centerfire ammunition was invented by the Frenchman Clement Pottet in 1829. However, Pottet would not perfect his design until 1855, the centerfire cartridge was improved by Benjamin Houllier, Gastinne Renette, Charles Lancaster, George Morse, Francois Schneider, Hiram Berdan and Edward Mounier Boxer. The identifying feature of centerfire ammunition is the primer which is a cup containing a primary explosive inserted into a recess in the center of the base of the cartridge. The firearm firing pin crushes this explosive between the cup and an anvil to produce hot gas and a shower of incandescent particles to ignite the powder charge, Berdan priming is less expensive to manufacture and is much more common in military-surplus ammunition made outside the United States. Berdan primers are named after their American inventor, Hiram Berdan of New York who invented his first variation of the Berdan primer and patented it on March 20,1866, in U. S. A small copper cylinder formed the shell of the cartridge, and this system worked well, allowing the option of installing a cap just before use of the propellant-loaded cartridge as well as permitting reloading the cartridge for reuse. S. Berdan primers have remained essentially the same functionally to the present day, Berdan primers are similar to the caps used in the caplock system, being small metal cups with pressure-sensitive explosive in them. Modern Berdan primers are pressed into the pocket of a Berdan-type cartridge case. Inside the primer pocket is a bump, the anvil, that rests against the center of the cup. Berdan cases are reusable, although the process is rather involved, the used primer must be removed, usually by hydraulic pressure or a pincer or lever that pulls the primer out of the bottom
12.
Cartridge (weaponry)
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Military and commercial producers continue to pursue the goal of caseless ammunition. A cartridge without a bullet is called a blank, One that is completely inert is called a dummy. Some artillery ammunition uses the same concept as found in small arms. In other cases, the shell is separate from the propellant charge. In popular use, the bullet is often misused to refer to a complete cartridge. The cartridge case seals a firing chamber in all directions excepting the bore, a firing pin strikes the primer and ignites it. The primer compound deflagrates, it does not detonate, a jet of burning gas from the primer ignites the propellant. Gases from the burning powder pressurize and expand the case to seal it against the chamber wall and these propellant gases push on the bullet base. In response to pressure, the bullet will move in the path of least resistance which is down the bore of the barrel. After the bullet leaves the barrel, the pressure drops to atmospheric pressure. The case, which had been expanded by chamber pressure. This eases removal of the case from the chamber, brass is a commonly used case material because it is resistant to corrosion. A brass case head can be work-hardened to withstand the pressures of cartridges. The neck and body portion of a case is easily annealed to make the case ductile enough to allow reforming so that it can be reloaded many times. Steel is used in some plinking ammunition, as well as in military ammunition. Steel is less expensive than brass, but it is not feasible to reload, Military forces typically consider small arms cartridge cases to be disposable, one-time-use devices. However, case weight affects how much ammunition a soldier can carry, conversely, steel is more susceptible to contamination and damage so all such cases are varnished or otherwise sealed against the elements. One downside caused by the strength of steel in the neck of these cases is that propellant gas can blow back past the neck
13.
Smith & Wesson Triple Lock
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The Triple lock, officially the Smith & Wesson.44 Hand Ejector 1st Model New Century, is a double-action revolver. It was and is considered by many, including handgun enthusiast and expert Elmer Keith and its popular name refers to its extra locking lug on the cylinder crane. This extra locking mechanism was deemed due to the increased power of the.44 Special cartridge. These 19th-century designs had an automatic ejector mechanism actuated when the frame was tipped up, the newer Hand Ejector models required the user to depress a plunger to eject spent cartridge casings. The New Century designation was in recognition of its status as Smith & Wessons first 20th century design and it was only manufactured between 1908 and 1915, for a total of 15,376 revolvers, a stock that sold out completely by 1917. It was replaced by a.44 Hand Ejector 2nd Model, most visibly different in lacking the ejector shroud, the British and Canadian militaries pressed for the removal of the third locking lug and shroud due to concerns the precision mechanism would collect dirt and malfunction. Additionally, the change simplified manufacturing, allowing Smith & Wesson to drop the price of the gun by $2, the ejector shroud was reintroduced in 1926, with the Hand Ejector 3rd Model, but the Triple Lock feature was never used again. To cover manufacturing shortages of the Webley Mk VI, early in the war the Ministry of Munitions contracted Colt, subsequent orders, lacking the third locking lug and ejector shroud, totalled 69,755 and were known as the Mark II. Jan.2000 American Handgunner June 2004 American Handgunner
14.
Revolver
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A revolver is a repeating handgun that has a revolving cylinder containing multiple chambers and at least one barrel for firing. Revolvers might be regarded as a subset of pistols, or as a subset of handguns. Though the term revolver usually only refers to handguns, other firearms may also have a revolving chamber and these include some models of grenade launchers, shotguns, and rifles. Most revolvers contain five or six rounds in the cylinder, though the original name was revolving gun, the short-hand revolver is universally used. The revolver allows the user to fire multiple rounds without reloading, each time the user cocks the hammer, the cylinder revolves to align the next chamber and round with the hammer and barrel, which gives this type of firearm its name. In a single-action revolver, the user pulls the back with his free hand or thumb. In a double-action revolver, pulling the trigger moves the back, then releases it. Loading and unloading a double-action revolver requires the operator to swing out the cylinder and insert the proper ammunition, the first guns with multichambered cylinders that revolved to feed one barrel were made in the late 16th century in Europe. They were expensive and rare curiosities, not until the 19th century would revolvers become common weapons of industrial production. One of the first was a flintlock revolver patented by Elisha Collier in 1814, the first percussion revolver was made by Lenormand of Paris in 1820 and the first percussion cap revolver was invented by the Italian Francesco Antonio Broccu in 1833. He received a prize of 300 francs for his invention, although he did not patent it, however, in 1835 a similar handgun was patented by Samuel Colt, who would go on to make the first mass-produced revolver. The first cartridge revolvers were produced around 1854 by Eugene Lefaucheux, revolvers soon became standard for nearly all uses. In the early 20th century, semi-automatic pistols were developed, which can hold more rounds, Automatic pistols also have a flat profile, more suitable for concealed carry. Automatic pistols have almost completely replaced revolvers in military and law enforcement use, revolvers still remain popular as back-up and off-duty handguns among American law enforcement officers and security guards. Also, revolvers are still common in the American private sector as defensive, in the development of firearms, an important limiting factor was the time it took to reload the weapon after it was fired. While the user was reloading, the weapon was useless, several approaches to the problem of increasing the rate of fire were developed, the earliest being multi-barrelled weapons which allowed two or more shots without reloading. Later weapons featured multiple barrels revolving along a single axis, the earliest examples of what today is called a revolver were made in Germany in the late 16th century. These weapons featured a barrel with a revolving cylinder holding the powder
15.
Handgun
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A handgun is a firearm designed to be handheld, in either one or both hands. This characteristic differentiates handguns as a class of firearms from long guns such as rifles. Major handgun subtypes are the revolver and pistol, other subtypes include derringers, the words pistol and handgun have overlapping variations, in meaning. Although handgun use often includes bracing with a hand, the essential distinguishing characteristic of a handgun is its facility for one-handed operation. The word pistol is often synonymous with the word handgun, some handgun experts make a technical distinction that views pistols as a subset of handguns. But UK/Commonwealth usage often does not make this distinction, handheld firearms were first made in China where gunpowder was first developed. By the 14th century, they existed in Europe as well, the first handheld firearms that might better be called pistols were made as early as the 15th century, but their creator is unknown. By the 18th century, the term came to be used often to refer to handheld firearms, previously there had been no such differentiation, and in fact Samuel Colts original patent was for a revolving-breech pistol. There is no equivalent for handgun in the Romance languages. The general types of handguns are listed below in their order of historical appearance, each type can be classified into many sub-types. Some of these types can also be classified using the general distinction between muzzle-loading firearms and breech-loading firearms. Single-shot pistols are the simplest possible form of pistols and are known to have existed in AD1365, the earliest handguns were single-shot, muzzle-loading guns with ignition provided by inserting a smoldering match cord into a touch hole. As such, they were nothing more than miniature cannon. Improvements followed in subsequent centuries, as types of locks were invented. In the matchlock, the separate match cord was affixed to a pivot which could be tripped by a trigger. In the wheellock, an analogous to that used in todays cigarette lighters replaced the smoldering match cord. In the 17th century, the flintlock, which strikes a flint against steel, the flintlock remained the standard method of small arms ignition around two hundred years. In the 19th century, percussion caps were developed, followed shortly by modern integrated-primer cartridges, an example of a single-shot pistol is the flare gun
16.
Gunpowder
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Gunpowder, also known as black powder, is the earliest known chemical explosive. It is a mixture of sulfur, charcoal, and potassium nitrate, the sulfur and charcoal act as fuels, and the saltpeter is an oxidizer. Black powder firearms are in limited use today in hunting, shooting, Black powder has been replaced for most industrial uses by high explosives such as dynamite. Black powder is assigned the UN number UN0027 and has a class of 1. 1D. It has a point of approximately 427–464 °C. The specific flash point may vary based on the composition of the gunpowder. Gunpowders specific gravity is 1. 70–1.82 or 1. 92–2.08, Gunpowder is classified as a low explosive because of its relatively slow decomposition rate and consequently low brisance. Low explosives deflagrate at subsonic speeds, whereas high explosives detonate, ignition of the powder packed behind a bullet must generate enough pressure to force it from the muzzle at high speed, but not enough to rupture the gun barrel. Gunpowder thus makes a good propellant, but is suitable for shattering rock or fortifications. Gunpowder was widely used to fill artillery shells and in mining and civil engineering to blast rock until the half of the 19th century. Black powder is used as a delay element in various munitions where its slow-burning properties are valuable. The spread of gunpowder across Asia from China is widely attributed to the Mongols, the earliest record of a written formula for gunpowder appears in the 11th century Song dynasty text, Wujing Zongyao. This discovery led to the invention of fireworks and the earliest gunpowder weapons in China, in the centuries following the Chinese discovery, gunpowder weapons began appearing in the Muslim world and Europe. The technology spread from China through the Middle East or Central Asia, the earliest Western accounts of gunpowder appear in texts written by English philosopher Roger Bacon in the 13th century. The most ardent protagonists were Nathaniel Halhad, Johann Backmann, Quintin Craufurd, however, due to lack of sufficient proof, these theories have not been widely accepted. A major problem confronting the study of the history of gunpowder is ready access to sources close to the events described. The translation difficulty has led to errors or loose interpretations bordering on artistic licence, early writings potentially mentioning gunpowder are sometimes marked by a linguistic process where old words acquired new meanings. For instance, the Arabic word naft transitioned from denoting naphtha to denoting gunpowder, saltpeter was known to the Chinese by the mid-1st century AD and there is strong evidence of the use of saltpeter and sulfur in various largely medicinal combinations
17.
.44 S&W American
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The.44 S&W American is an American centerfire revolver cartridge. Used in the Smith & Wesson Model 3, it was introduced around 1869, between 1871 and 1873, the.44 Model 3 was used as the standard United States Army sidearm. It was also offered in the Merwin Hulbert & Co. Army revolvers and it used an outside lubricated heeled bullet and appeared in either Boxer and Berdan priming, and both black and smokeless powder loadings. Its power resembles the.41 Long Colt. 32-20 Winchester, or. 44-40 Winchester, the.44 American ceased to be commercially available around 1940. It can be handloaded by shortening and reforming.44 Special cases, original black-powder revolvers should only use black-powder loads, modern powders will generate excessive pressures. During the Gunfight at the O. K. Corral on October 26,1881, Earp had received the weapon as a gift from Tombstone, Arizona mayor and Tombstone Epitaph newspaper editor John Clum. List of cartridges by caliber Table of handgun and rifle cartridges 11mm caliber Barnes, Frank C. ed. by John T. Amber.44 S&W American, in Cartridges of the World, pp.167 &177. Barnes, Frank C. ed. by John T. Amber. 32-20 Winchester in Cartridges of the World, Barnes, Frank C. ed. by John T. Amber. 44-40 Winchester in Cartridges of the World, p.61
18.
.44-40 Winchester
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The. 44-40 Winchester, also known as.44 Winchester.44 WCF, and.44 Largo was introduced in 1873 by the Winchester Repeating Arms Company. It was the first metallic centerfire cartridge manufactured by Winchester, and was promoted as the standard chambering for the new Winchester Model 1873 rifle. As both a rifle and a caliber, the cartridge soon became widely popular, so much so that the Winchester Model 1873 rifle became known as The gun that won the West. When Winchester released the new cartridge, many other firearm companies chambered their guns in the new round. 44-40, settlers, lawmen, and cowboys appreciated the convenience of being able to carry a single caliber of ammunition which they could fire in both pistol and rifle. The cartridge was sold as.44 Winchester. When the Union Metallic Cartridge Co. began selling their own version of the cartridge, it adopted the name. 44-40, over time the name stuck, and eventually Winchester adopted the. 44-40 designation for the round after World War II. Winchester uses the designation 44-40 Winchester on packaging, the initial standard load for the cartridge was 40 grains of black powder propelling a 200-grain round nose flat point bullet at approximately 1,245 ft/s. Winchester catalogues listed velocities of 1,300 ft/s by 1875, in 1886 U. M. C. also began offering a slightly heavier 217-grain bullet at 1,190 ft/s, also with 40 grains of black powder. Winchester soon began to carry the 217-grain loading as well, in 1895 Winchester introduced a 200-grain cartridge bulk loaded with 17-grain of DuPont No.2 Smokeless powder and a bullet for 1,300 ft/s, and in 1896 U. M. C. Followed suit with a 217-grain bullet @1,235 ft/s Soon both companies were offering the cartridge with lead Metal Patched, and full metal jacket versions. H. V. Boasting a velocity of 1,540 ft/s with a 200-grain copper-jacketed bullet from a 24-inch barrel length, U. M. C. the most common current loading is a 200-grain bullet @1,190 ft/s. By 1942 more modern cartridges had all but eclipsed the. 44-40, List of handgun cartridges List of rifle cartridges Table of handgun and rifle cartridges
19.
.45 Colt
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The.45 Colt or.45 Long Colt cartridge is a handgun cartridge dating to 1872. It is a black-powder revolver round developed for the Colt Single Action Army revolver and this cartridge was adopted by the U. S. Army in 1873 and served as an official US military handgun cartridge for 14 years. Colt began work on the revolver in 1871, and submitted a sample to the U. S. Army in late 1872, the revolver was accepted for purchase in 1873. The cartridge is an inside lubricated type, the rebated heel type bullet design of its predecessor, the.44 Colt, was eliminated, since it was an outside lubricated type, which would pick up dirt and grit during handling. The.45 Colt replaced the.50 caliber Model 1871 Remington single shot pistol, while the Colt remained popular, the Smith & Wesson M1875 Army Schofield Revolver was approved as an alternate which created a logistic problem for the Army. Adoption of the.45 M1887 Military Ball Cartridge resolved the Armys ammunition logistic problems, the M1887 Govt round was replaced by the.38 Long Colt in 1892. In 1909, the.45 M1909 round was issued along with the.45 Colt New Service revolver and this round was never loaded commercially, and is almost identical to the original.45 Colt round, except having a larger diameter rim. The rim is large enough that it cannot be loaded in adjacent chambers in the rod-ejector Colt model, the.45 Colt remains popular with renewed interest in Cowboy Action Shooting. The modern.45 Colt bullet has changed as well, and it is now.451 inches in diameter for jacketed bullets, the.45 Colt became the basis for other rounds, such as the.454 Casull. The.45 Colt originally was a cartridge, but modern loadings use smokeless powder. The original black-powder loads called for 28 to 40 grains of powder behind a 230-to-255-grain lead bullet. These loads developed muzzle velocities of up to 1,050 ft/s, because of this power and its excellent accuracy, the.45 Colt was the most-used cartridge at the time of its introduction, succeeding the.44 WCF. The.45 Colt at that time did not enjoy the. 44-40s advantage of a Winchester rifle chambered for it, the rumor was that early.45 Colt cartridges had a very minimal rim, and would not eject reliably. Currently manufactured brass has a rim of adequate diameter for such uses, modern Winchesters, Marlins and replicas have remedied this omission almost 100 years after the fact, and the.45 Colt is now available in modern lever-action rifles. While this has one of numerous arguments to explain the lack of a rifle chambered in.45 Colt, in fact. It required the expiration of those original patents for the.45 Colt to become available in a rifle, todays standard factory loads develop around 400 ft·lbf of muzzle energy at about 860 ft/s, making it roughly equivalent to modern.45 ACP loads. There are Cowboy Action Shooting loads which develop muzzle velocities of around 750 ft/s, cartridges of the World states that.45 Colt should never be loaded to more than 800 fps. Some handloads and factory manufactured cartridges put this round in the class as the.44 Magnum using special revolvers
20.
Terminal ballistics
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Terminal ballistics, a sub-field of ballistics, is the study of the behavior and effects of a projectile when it hits its target and transfers its energy to the target. Bullet design and the velocity of impact determine the effectiveness of its impact, if the impactor and medium have similar density this happens at an impact depth equal to the length of the impactor. For this simple result to be valid, the medium is considered to have no integral shear strength. Note that even though the projectile has stopped, the momentum is still transferred, the third class may limit penetration by expanding or fragmenting. For short range target shooting on ranges up to 50 meters, aerodynamics are relatively unimportant, as long as the bullet is balanced so it does not tumble, the aerodynamics are unimportant. For shooting at targets, the best bullet is one that will punch a perfect hole through the target. They have a flat front, often with a relatively sharp edge along the perimeter. The flat front punches out a hole in the paper, close to, if not equal to. This allows for easy, unambiguous scoring of the target, since cutting the edge of a target ring will result in scoring the higher score, fractions of an inch are important. Magazine-fed pistols may not reliably feed wadcutters because of the angular shape, to address this, the semiwadcutter is used. The semiwadcutter consists of a section that comes to a smaller flat. The flat point punches a hole, and the shoulder opens the hole up cleanly. For steel targets, the concern is to provide force to knock over the target while minimizing the damage to the target. There are also specialized bullets designed for use in long range target shooting with high-powered rifles. Research in the 1950s by the U. S, the U. S. military now issues ammunition to snipers that use bullets of this type. In 7. 62×51mm NATO, M852 Match and M118LR ammunition are issued, both of which use Sierra MatchKing bullets, in 5. 56×45mm NATO, those U. S. Navy and U. S. The driving force behind these projectiles is the wish to enhance the practical maximum effective range beyond normal standards, to achieve this, the bullets have to be very long and normal cartridge overall lengths often have to be exceeded. Common rifling twist rates also often have to be tightened to stabilize very long projectiles, such commercially nonexistent cartridges are termed wildcats
21.
Energy density
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Energy density is the amount of energy stored in a given system or region of space per unit volume. Colloquially it may also be used for energy per unit mass, often only the useful or extractable energy is measured, which is to say that chemically inaccessible energy such as rest mass energy is ignored. In short, pressure is a measure of the enthalpy per unit volume of a system, a pressure gradient has a potential to perform work on the surroundings by converting enthalpy until equilibrium is reached. There are many different types of stored in materials. In order of the magnitude of the energy released, these types of reactions are, nuclear, chemical, electrochemical. Chemical reactions are used by animals to derive energy from food, electrochemical reactions are used by most mobile devices such as laptop computers and mobile phones to release the energy from batteries. The following is a list of the energy densities of commonly used or well-known energy storage materials. Note that this list does not consider the mass of reactants commonly available such as the oxygen required for combustion or the efficiency in use. The following unit conversions may be helpful when considering the data in the table,1 MJ ≈0.28 kWh ≈0.37 HPh. In energy storage applications the energy density relates the mass of a store to the volume of the storage facility. The higher the density of the fuel, the more energy may be stored or transported for the same amount of volume. The energy density of a fuel per unit mass is called the energy of that fuel. The greatest energy source by far is mass itself and this energy, E = mc2, where m = ρV, ρ is the mass per unit volume, V is the volume of the mass itself and c is the speed of light. This energy, however, can be released only by the processes of nuclear fission, nuclear fusion, nuclear reactions cannot be realized by chemical reactions such as combustion. Although greater matter densities can be achieved, the density of a star would approximate the most dense system capable of matter-antimatter annihilation possible. A black hole, although denser than a star, does not have an equivalent anti-particle form. In the case of small black holes the power output would be tremendous. The highest density sources of energy aside from antimatter are fusion and fission, fusion includes energy from the sun which will be available for billions of years but so far, sustained fusion power production continues to be elusive
22.
External ballistics
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External ballistics or exterior ballistics is the part of ballistics that deals with the behavior of a projectile in flight. Gun-launched projectiles may be unpowered, deriving all their velocity from the propellants ignition until the exits the gun barrel. External ballistics is also concerned with the free-flight of other projectiles, such as balls, arrows etc. When in flight, the main or major forces acting on the projectile are gravity, drag, and if present, wind, if in powered fight, thrust, and if guided, the forces imparted by the control surfaces. In small arms external ballistics applications, gravity imparts a downward acceleration on the projectile, drag, or the air resistance, decelerates the projectile with a force proportional to the square of the velocity. Wind makes the projectile deviate from its trajectory, during flight, gravity, drag, and wind have a major impact on the path of the projectile, and must be accounted for when predicting how the projectile will travel. Meso variables can become significant for firearms users that have to deal with angled shot scenarios or extended ranges, at extremely long ranges, artillery must fire projectiles along trajectories that are not even approximately straight, they are closer to parabolic, although air resistance affects this. In super gun artillery cases, like the Paris gun, very subtle effects that are not covered in this article can further refine aiming solutions. The CP behind the CG condition yields stable projectile flight, meaning the projectile will not overturn during flight through the due to aerodynamic forces. Projectiles like small arms bullets and artillery shells must deal with their CP being in front of their CG, to stabilize such projectiles the projectile is spun around its longitudinal axis. The spinning mass creates gyroscopic forces that keep the bullets length axis resistant to the destabilizing overturning torque of the CP being in front of the CG, the effect of gravity on a projectile in flight is often referred to as projectile drop or bullet drop. It is important to understand the effect of gravity when zeroing the sighting components of a gun, to plan for projectile drop and compensate properly, one must understand parabolic shaped trajectories. In order for a projectile to impact any distant target, the barrel must be inclined to an elevation angle relative to the target. This is due to the fact that the projectile will begin to respond to the effects of gravity the instant it is free from the constraints of the bore. The imaginary line down the axis of the bore and out to infinity is called the line of departure and is the line on which the projectile leaves the barrel. Due to the effects of gravity a projectile can never impact a target higher than the line of departure, when a positively inclined projectile travels downrange, it arcs below the line of departure as it is being deflected off its initial path by gravity. Projectile/Bullet drop is defined as the distance of the projectile below the line of departure from the bore. Even when the line of departure is tilted upward or downward, projectile drop does not describe the actual trajectory of the projectile
23.
Handloading
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Handloading or reloading is the process of loading firearm cartridges or shotgun shells by assembling the individual components, rather than purchasing completely assembled, factory-loaded ammunition. Economy, increased accuracy, performance, commercial ammunition shortages, Reloading fired cartridge cases can save the shooter money, or provides the shooter with more, and higher quality, ammunition within a given budget. Besides economy, the ability to customize the performance of ammunition is a common goal, hunters may desire cartridges with specialized bullets or specific performance as regards bullet and velocity. Target shooters seek the best achievable accuracy, as well as the best shot-to-shot consistency, shotgunning enthusiasts can make specialty rounds not available in commercial inventories at any price. This technique also enables hunters to use the rifle and caliber to hunt a wider variety of game. Collectors of obsolete firearms who want to shoot those guns often must handload because appropriate cartridges or shotshells are no commercially produced. Handloaders can also create cartridges for which no equivalent exists - wildcat cartridges. As with any hobby, the enjoyment of the reloading process may be the most important benefit. Recurring shortages of ammunition are also reasons to reload cartridges. There are three aspects to ballistics, internal ballistics, external ballistics, and terminal ballistics, internal ballistics refers to things that happen inside the firearm during and after firing but before the bullet leaves the muzzle. Each cartridge reloaded can have each component carefully matched to the rest of the cartridges in the batch, brass cases can be matched by volume, weight, and concentricity, bullets by weight and design, powder charges by weight, type, case filling, and packing scheme. Where the most extreme accuracy is demanded, such as in rifle benchrest shooting, handloading is a prerequisite for success. The basic piece of equipment for handloading is the press, a press is a device that uses compound leverage to push the cases into the dies that perform the loading operations. Presses vary from simple, inexpensive single stage models, to complex progressive models that will eject a cartridge with each pull of a lever. Inexpensive tong tools have been used for reloading since the mid-19th century and they resembled a large pair of pliers and can be caliber specific or have interchangeable dies. Reloading presses are often categorized by the letter of the alphabet that they most resemble, O, C, the sturdiest presses, suitable for bullet swaging functions as well as for normal reloading die usage, are of the O type. Heavy steel completely encloses the single die on these presses, equally sturdy presses for all but bullet swaging use often resemble the letter C. Both steel and aluminum construction are seen with C presses, some users prefer C style presses over O presses, as there is more room to place bullets into cartridge mouths on C presses
24.
Elmer Keith
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Elmer Merrifield Keith was an Idaho rancher, firearms enthusiast, and author. Keith was instrumental in the development of the first magnum revolver cartridge, Keiths trademarks were his cigars, his ten-gallon Stetson, and his outspoken opinions. Keith was an avid hunter in the earliest days of the sport. He was married to Loraine Randall, Elmer Keith was born in Missouri but was raised in Montana, Idaho, and eastern Oregon. In the 1930s and early 1940s, he had a ranch on the North Fork of the Salmon River near Salmon, in the late 1940s, Elmer and Loraine left the ranch and moved into the town of Salmon. During World War II, Keith served as an inspector at the Ogden, the rifles that he inspected were cartouche stamped with the initials OGEK in a rectangular box, on the buttstock. Rifles stamped OGEK without a rectangular box were inspected by Ed Klouser at the same Ogden Arsenal, in The Phantom Of Phu Bai, a biography of USMC Scout Sniper Eric England written by Dr. Joseph B. Turner, one chapter is about Elmer Keith and his influence on the shooting community, the.357 Magnum first became available in 1935 and quickly became a favorite among law enforcement and civilian users. Buying a.357 Magnum revolver gave the all the abilities of the well-established.38 Special. Keiths contributions to the development of the.357 Magnum have been questioned by some writers. The.44 Magnum was developed in much the same way, Keith had earlier determined that the thinner chamber walls of the.45 Colt would not comfortably withstand the pressures generated by his own heavy loads. He therefore started experimenting with the.44 Special revolver, the resulting.44 Special Magnum was a formidable cartridge for handgun hunting, firing a 250 grain bullet at 1,200 ft/s. Keith encouraged Smith & Wesson and Remington to produce a version of this new high pressure loading. The.41 Magnum, released in 1963, was an attempt to reach a middle ground between the.357 and.44 magnums, the.357 Magnum was adequate for hunting deer-sized game, but the limited power meant it needed to be used by a skilled marksman. The.44 Magnum provided far more power, easily taking deer sized game, but recoil and muzzle blast are substantial, at least in the earliest commercial loadings. The.41 Magnum, inspired by the older, obsolete.41 Long Colt cartridge, was intended to more power than the.357 Magnum with less recoil. However, while there was a community of shooters preferring the.41 Magnum. Some police, to whom the.41 Magnum was initially marketed, were happy with the.38 Special or
25.
Caliber
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In guns, particularly firearms, caliber or calibre is the approximate internal diameter of the barrel, or the diameter of the projectile it fires, in hundredths or sometimes thousandths of an inch. For example, a 45 caliber firearm has a diameter of.45 of an inch. Barrel diameters can also be expressed using metric dimensions, as in 9mm pistol, when the barrel diameter is given in inches, the abbreviation cal can be used. Good performance requires a bullet to closely match the diameter of a barrel to ensure a good seal. While modern cartridges and cartridge firearms are referred to by the cartridge name. Firearm calibers outside the range of 17 to 50 exist, but are rarely encountered. Larger calibers, such as.577.585.600.700, the.950 JDJ is the only known cartridge beyond 79 caliber used in a rifle. Referring to artillery, caliber is used to describe the length as multiples of the bore diameter. A 5-inch 50 calibre gun has a diameter of 5 in. The main guns of the USS Missouri are 1650 caliber, makers of early cartridge arms had to invent methods of naming the cartridges, since no established convention existed then. One of the early established cartridge arms was the Spencer repeating rifle, later various derivatives were created using the same basic cartridge, but with smaller-diameter bullets, these were named by the cartridge diameter at the base and mouth. The original No.56 became the. 56-56, and the smaller versions. 56-52. 56-50, the. 56-52, the most common of the new calibers, used a 50-cal bullet. Optionally, the weight in grains was designated, e. g. 45-70-405. Variations on these methods persist today, with new cartridges such as the.204 Ruger, metric diameters for small arms refer to cartridge dimensions and are expressed with an × between the bore diameter and the length of the cartridge case, for example,7. 62×51 NATO. This indicates that the diameter is 7. 62mm, loaded in a case 51mm long. Similarly, the 6. 5×55 Swedish cartridge has a diameter of 6.5 mm. An exception to rule is the proprietary cartridge used by U. S. maker Lazzeroni. The following table lists commonly used calibers where both metric and imperial are used as equivalents
26.
Remington Arms
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Remington Arms Company, LLC is an American manufacturer of firearms and ammunition in the United States. It was founded in 1816 by Eliphalet Remington in Ilion, New York, as E. Remington, Remington is Americas oldest gun maker and Its Americas oldest factory that still makes its original product-guns. It is the only U. S. company which produces both firearms and ammunition domestically and is the largest U. S. producer of shotguns, Remington has also developed or adopted more cartridges than any other gun maker or ammunition manufacturer in the world. Additionally its products are distributed in over 60 foreign countries, making its distribution base, Remington Arms is part of the Freedom Group, which is owned by Cerberus Capital Management. Remington built a new plant in Huntsville, Alabama which is now building Modern Sporting Rifles, the Remington company was founded in 1816. Eliphalet Remington II believed he could build a gun than he could buy. Farming communities in the region were famous for their skills and self-sufficiency. Remingtons father was a blacksmith, and wanted to expand his business into rifle barrel production, local residents often built their own rifles to save on costs, but purchased the barrel. Remingtons father sent him to a barrel maker in a major city to purchase a barrel. At the time, the method was to heat and wrap long flat bars of iron around a rod of the caliber desired. By heating and hammering the coiled bars around the central rod, after the young man returned home, his family added a successful barrel making operation to his fathers forge, in Ilion Gorge, New York. Remington began designing and building a rifle for himself. At age 23, he entered a match, though he only finished second. Before Remington left the field day, he had received so many orders from other competitors that he was now officially in the gunsmithing business. By 1828, the moved to nearby Ilion, New York. On March 7,1888, ownership of E. Remington & Sons left possession of the Remington family and was sold to new owners, Marcellus Hartley, at this time the name was formally changed to the Remington Arms Company. The Bridgeport site became the home of Remingtons ammunition plant, in 1912, Remington and Union Metallic Cartridge Company were combined into a single entity, called Remington UMC. In 1915, the plant at Ilion was expanded, and with this expansion became basically the same plant as today, during World War I, Remington produced arms under contract for several Allied powers
27.
.357 Magnum
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The.357 S&W Magnum, or simply.357 Magnum, is a revolver cartridge with a. 357-inch bullet diameter. It was created by Elmer Keith, Phillip B, Wesson of firearms manufacturers Smith & Wesson and Winchester. It is based upon Smith & Wessons earlier.38 Special cartridge, the.357 Magnum cartridge was introduced in 1934, and its use has since become widespread. This cartridge started the Magnum era of handgun ammunition, the.357 Magnum cartridge is notable for its stopping power. The.357 Magnum was collaboratively developed over a period in the early to mid-1930s by a group of individuals in a response to Colts.38 Super Automatic. Tests at the revealed that those vests defeated any handgun cartridge traveling at less than about 1,000 feet per second. Colts.38 Super Automatic just edged over that velocity and was able to penetrate car doors and vests that bootleggers and gangsters were employing as cover. Though.38 and.357 would seem to be different diameter chamberings, they are in fact identical, the.38 Special nomenclature relates to the previous use of heeled bullets, which were the same diameter as the case. Thus, the only difference in the two cartridges is a slight difference in length, solely for safety purposes. Much credit for the. 357s early development is given to hunter and experimenter Elmer Keith, the. 38-44 HV load used the. 38-Special cartridge loaded to a much higher velocity than standard. 38-Special ammunition. The. 38-44 revolvers were made by using a.44 Special size gun with the barrel bored to accept. 357-caliber bullets, since the frame, cylinder, and barrel were much stronger than the standard.38 Special components, it was capable of withstanding much higher pressures. The. 38-44 HV round, while no longer available, was in most cases the equal of the later.357 Magnum, which works at more than double the pressure of standard.38 Special. Elmer Keith also contributed the Keith-style bullet, which increased the mass of bullet located outside the cartridge, the Keith bullet also employed a large, flat meplat, thus enabling rapid energy transfer for greater wounding properties. At the same time, this design does not deform like a hollow point. These characteristics of the Keith bullet make it suitable for hunting applications as well as for target shooting. In order to reassert itself as the leading law-enforcement armament provider, Smith & Wesson developed the.357 Magnum, Wesson leading the effort within Smith & Wesson, along with considerable technical assistance from Phillip B. Sharpe, a member of the Technical Division staff of the National Rifle Association, the new round was developed from Smith & Wessons existing.38 Special round. It used a different powder load, and ultimately the case was extended by 1⁄8 inch, the case extension was more a matter of safety than of necessity
28.
.41 Remington Magnum
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While Keith had suggested a softer.41 Special cartridge as early as 1955, this idea was passed over in favor of the Magnum option, and the Special survives only as a custom wildcat cartridge. The powerful.44 Magnum, primarily a hunting round, was considered overkill for police use. In addition, the revolvers chambered for the.44 were considered too large, bulky, and heavy for police carry. As a result, the.41 Magnum load was released at an advertised 1500 ft/s, unfortunately, the police load as delivered was regarded as overpowered by most law enforcement agencies, many of whom were still using.38 Special revolvers. Additionally, Smith & Wesson simply adapted their large N-frame revolvers for the new cartridge, the Model 58, targeted for the law enforcement market, was introduced on July 10,1964. Weighing in at 41 ounces, the Model 58 compared unfavorably with other popular revolvers available at the time, Smith & Wesson produced a high-end, premium revolver in.41 Magnum caliber, the Model 57, almost identical to the.44 Magnum-chambered Model 29. Magnum Researchs Desert Eagle division produced a.41 Remington Magnum in their semi-automatic Mark VII, marshall and Sanow called the.41 Magnum one of our most unappreciated calibers. 10 mm caliber List of handgun cartridges Table of handgun and rifle cartridges Ballistics By The Inch. 41mag results Smith & Wesson Model 657
29.
.44 Magnum
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The.44 Remington Magnum, or simply.44 Magnum, and frequently.44 Mag, is a large-bore cartridge originally designed for revolvers. After its introduction, it was adopted for carbines and rifles. Despite the.44 designation, guns chambered for the.44 Magnum round, and its parent, the.44 Magnum is based on a lengthened.44 Special case, loaded to higher pressures for greater velocity. The.44 Magnum cartridge was the end result of years of tuned handloading of the.44 Special, the.44 Special, and other large-bore handgun cartridges, were being loaded with heavy bullets, pushed at higher than normal velocities for better hunting performance. One of these handloaders was Elmer Keith, a writer and outdoorsman of the 20th century, Elmer Keith settled on the.44 Special cartridge as the basis for his experimentation, rather than the larger.45 Colt. At the time, the selection of.44 caliber projectiles for handloaders was more varied, also, the.44 Special case was smaller in diameter than the.45 Colt case. In revolvers of the cylinder size, this meant the.44 caliber revolvers had thicker. This allowed higher pressures to be used with less risk of a burst cylinder, Keith encouraged Smith & Wesson and Remington to produce a commercial version of this new high-pressure loading, and revolvers chambered for it. Smith & Wessons first.44 Magnum revolver, the Model 29, was built on December 15,1955, julian Hatcher, and Elmer Keith received two of the first production models. Hatchers review of the new Smith & Wesson revolver and the.44 Magnum cartridge appeared in the March,1956 issue of the magazine, Smith & Wesson produced 3,100 of these revolvers in 1956. By the summer of 1956, Sturm, Ruger became aware of this project, Ruger began shipping their new revolver in late November,1956. The film Dirty Harry, prominently featuring the S&W M29, contributed to that models popularity, Ruger introduced its first long gun, a semi-automatic carbine called the Ruger Model 44 chambered for.44 Magnum, in 1959. Marlin followed soon after with a lever action Model 1894 in.44 Magnum, the. 38-40 Winchester and. 32-20 Winchester were also available in both carbines and revolvers, allowing the shooter to use one type of ammunition for both firearms. In 2006, to commemorate the 50th anniversary of the.44 Magnum, Ruger introduced a special 50th anniversary Blackhawk revolver, the.44 Magnum delivers a large, heavy bullet with high velocity for a handgun. In its full-powered form, it produces so much recoil and muzzle blast that it is considered to be unsuitable for use as a police weapon. Rapid fire is difficult and strenuous on the hands, especially for shooters of smaller build or with small hands. Although marketed as a.44 caliber, the.44 Magnum, the.44 designation is a carryover from the early measurements of heeled bullets, used in the later 19th century. In those times, bullets were measured on the outside of the cartridge, not the inside of the cartridge
30.
.38-40 Winchester
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The. 38-40 Winchester is actually a.40 caliber cartridge shooting.401 caliber bullets. The cartridge was introduced by Winchester in 1874 and is derived from their. 44-40 Winchester and this cartridge was introduced for rifles, but in its reintroduction for Cowboy Action Shooting it has seen some popularity as a pistol cartridge. It is not particularly suited to hunting larger game, but it was popular when it was introduced, along with the previous. 44-40 Winchester. It can be used successfully on smaller animals, and for self-defense. Current loadings are intended for revolvers and it is unclear why this cartridge was introduced as it is very similar to the. 44-40 from which it was derived. It has approximately 110 ft·lbf less muzzle energy, and has a muzzle velocity about 110 ft/s less than the. 44-40, the bullet differs by only.026 inches in bullet diameter and 20 grains in standard bullet weight from the original. 44-40. The goal may have been to reduce recoil while maintaining a similar bullet sectional density, most reloading dies are designed to size fired brass to the chamber specification rather than that of the original factory ammunition case profile. The renewed interest in this caliber can be explained by the popularity of Cowboy Action Shooting. Several single-action revolvers have recently been chambered for this cartridge, including the Ruger Vaquero, most modern reloading data for this cartridge is found in the handgun section of reloading manuals. Though introduced as a cartridge, traditional sources suggest the. 38-40 performs inadequately on deer. Ballistically, commercial cowboy loads are similar to the much newer.40 S&W, sharing the same diameter, bullet weight. A limited number of hunting loads are available commercially, which produce about 25% more muzzle energy than the common target ammunition. 38-40. 38-40 WCF.38 CFW.38 WCF.38 caliber
31.
.38 Special
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The.38 Smith & Wesson Special is a rimmed, centerfire cartridge designed by Smith & Wesson. It is most commonly used in revolvers, although some semi-automatic pistols, in other parts of the world, it is known by its metric designation of 9×29. 5mmR or 9. 1×29mmR. Noted for its accuracy and manageable recoil, the.38 Special remains the most popular cartridge in the world more than a century after its introduction. It is used for shooting, formal target competition, personal defense. Despite its name, the caliber of the.38 Special cartridge is actually. 357–.358 inches, except for case length, the.38 Special is identical to the.38 Short Colt.38 Long Colt, and.357 Magnum. This allows the.38 Special round to be fired in revolvers chambered for the.357 Magnum. Upon its introduction, the.38 Special was originally loaded with black powder and this.38 Special variant incorporated a 200 grains round-nosed lead Lubaloy bullet, the.38 Super Police. Remington-Peters also introduced a similar loading, testing revealed that the longer, heavier 200 grains. 357-calibre bullet fired at low velocity tended to keyhole or tumble upon impact, providing more shock effect against unprotected personnel. This cartridge was called the.38 S&W Super Police or the. 38/200, britain would later adopt the. 38/200 as its standard military handgun cartridge. In 1930, Smith & Wesson introduced a large frame.38 Special revolver with a 5-inch barrel and fixed sights intended for police use, the following year, a new high-power loading called the. That same year, Colt Firearms announced that their Colt Official Police would also handle high-speed.38 Special loadings, the. 38/44 high-speed cartridge came in three bullet weights,158 grains,150 and 110 grains, with either coated lead or steel jacket, metal-piercing bullets. The media attention gathered by the. 38/44 and its ammunition eventually led Smith & Wesson to develop a new cartridge with a longer case length in 1934—this was the.357 Magnum. During World War II, some U. S. aircrew were issued.38 Special S&W Victory revolvers as sidearms in the event of a forced landing, the new military.38 Special loading propelled its 158 grains bullet at a standard 850 ft/s from a 4-inch revolver barrel. During the war, many U. S. naval and marine aircrew were also issued red-tipped.38 Special tracer rounds using either a 120 or 158 gr bullet for emergency signaling purposes. In 1956, the U. S. Air Force adopted the Cartridge, Caliber.38, Ball M41, a military variant of the.38 Special cartridge designed to conform to the rules of land warfare. By 1961, a slightly revised M41.38 cartridge specification known as the Cartridge, Caliber.38 Ball, Special, a variant of the standard M41 cartridge with a semi-pointed, unjacketed lead bullet was later adopted for CONUS police and security personnel. At the same time.38 tracer cartridges were reintroduced by the US Navy, Marines, tracer cartridges in.38 Special caliber of different colors were issued, generally as part of a standard aircrew survival vest kit. A request for more powerful.38 Special ammunition for use by Air Police and security personnel resulted in the Caliber.38 Special, Ball, in 1972, the Federal Bureau of Investigation introduced a new.38 +P loading that became known as the FBI Load
32.
Shooting sports
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A shooting sport is a competitive sport involving tests of proficiency using various types of guns, such as firearms and airguns. Shooting sports are categorized by the type of firearm, target, for similar reasons, concerned over poor marksmanship during the American Civil War, veteran Union officers Col. William C. Church and Gen. George Wingate formed the National Rifle Association of America in 1871 for the purpose of promoting and encouraging rifle shooting on a scientific basis. In 1872, with help from New York state, a site on Long Island. Named Creedmoor, the range opened in 1872, and became the site of the first National Matches until New York politics forced the NRA to move the matches to Sea Girt, New Jersey. The popularity of the National Matches soon forced the event to be moved to its present, much larger location, Camp Perry. In 1903, the U. S. Congress created the National Board for the Promotion of Rifle Practice, the NBPRP also participates in the National Matches at Camp Perry. In 1903, the NRA began to establish rifle clubs at all colleges, universities. By 1906, youth programs were in full swing with more than 200 boys competing in the National Matches, french pistol champion and founder of the modern Olympics, Pierre de Coubertin, participated in many of these early competitions. This fact certainly contributed to the inclusion of five shooting events in the 1896 Olympics, over the years, the events have been changed a number of times in order to keep up with technology and social standards. The targets that formerly resembled humans or animals in their shape, at the same time, some events have been dropped and new ones have been added. The 2004 Olympics featured three shooting disciplines where athletes competed for 51 medals in 10 mens and 7 womens events—slightly fewer than the previous Olympic schedule, the Olympic Games continue to provide the shooting sports with its greatest public relations opportunity. The sport has always enjoyed the distinction of awarding the first medals of the Games, internationally, the International Shooting Sport Federation has oversight of all Olympic shooting events worldwide, while National Governing Bodies administer the sport within each country. Having originally established shooting as a sport in the USA. The NRA dutifully managed and financially supported international and conventional shooting sports for over 100 years until the formation of USA Shooting, modern competitive archery involves shooting arrows at a target for accuracy from a set distance or distances. A person who participates in archery is called an archer or a bowman—and a person who is fond of or an expert at archery is sometimes called a toxophilite. The most popular competitions worldwide are called target archery, another form, particularly popular in Europe and America, is field archery, which generally is shot at targets set at various distances in a wooded setting. There are also several other lesser-known and historical forms, as well as archery novelty games, note that the tournament rules vary from organization to organization
33.
Plinking
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Plinking refers to informal target shooting done for pleasure typically at non-standard targets such as tin cans, logs, soda bottles, or any other homemade or naturally occurring target. A person involving in the exercise is colloquially known as a plinkster. In contrast to shooting done at established target ranges, plinking is generally done at home, in a pit, open field. The term plinking is an onomatopoeia of the sharp, metallic sound that a projectile makes when hitting a metal target, the most common calibre used for plinking is the.22 Long Rifle rimfire cartridge, since these rounds are relatively inexpensive and have a low recoil. Abraham Lincoln used to practice plinking as a good and useful pastime, since target ranges generally charge a fee for the use of their facilities, and shooter usually have to buy their own paper targets, going to a target range can cost significantly. Many shooters also find the air to be a much more pleasant shooting environment than the inside of a target range. Plinking can be alone at the individual pace of the shooter, who is free to move around at will, or in a group. The targets themselves that are used are one of the reasons why plinking is popular among gun enthusiasts. A three dimensional target in a setting is much more akin to a real world hunting scenario. A plinking target will also often much more positively to a hit than a paper target will, either with an audible impact. Glossary of firearms terminology List of rifle cartridges Hunting Target shooting Power Plinker - Promoting the benefits of plinking
34.
Cowboy action shooting
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Cowboy action shooting is a competitive shooting sport that originated in Southern California, US, in the early 1980s. CAS is a type of multi-gun match utilizing a combination of pistol, rifle, and/or shotgun in a variety of old west themed courses of fire for time and accuracy. Participants must dress in appropriate theme or era costume as well as use gear, winchester 1887 lever-action shotguns and Colt Lightning slide-action rifles are also allowed in competition. Both original and reproduction guns are equally acceptable, all CAS handguns must be single-action, meaning that the hammer must be manually cocked before each shot can be fired. Competition in a CAS match generally requires four guns, two revolvers, a shotgun, and a rifle chambered in a centerfire revolver caliber of a type in use prior to 1899. Some CAS matches also offer side events for single-shot buffalo rifles, derringers, speed shotgun, replica firearms are available from companies such as Ruger, Colt, Uberti, Pedersoli, Stoeger, Chiappa, Pietta, Armi San Marco and U. S. One variant of CAS currently sanctioned by SASS is Wild Bunch Action Shooting, according to SASS, this form uses firearms typical of those used in the taming of the Old West just after the turn of the 20th century. The revolvers used in normal SASS events are replaced with 1911 pistols, lever-action rifles remain in use, as in traditional CAS, originals and replicas are acceptable. In SASS Wild Bunch matches, pistols must be chambered for.45 ACP, rifles must be chambered for cartridges of.40 caliber or greater. Additionally, maximum velocities are limited to 1000 ft/s for pistol ammunition and 1400 ft/s for rifle ammunition. Competitors are required to wear an Old West or Victorian era style outfit, one exception to this is that safety glasses and hearing protection must be worn when shooting. Depending on the standards of the organization, clothing may be historically accurate for the late 19th century or may just be suggestive of the Old West. Some groups allow for similar to that worn by characters in a western B-movie. In SASS-sponsored Wild Bunch shooting, the dress is military clothing of the early 20th century. Participants must select an alias out of the Old West or have an old west flair, aliases are registered with the sanctioning body so they are unique to the participant. Many find it necessary to be creative in selecting an alias as virtually all historical names such as Wyatt Earp, registered names cannot sound the same as another registered name. Competition involves a number of separate shooting scenarios known as stages, stages are always different, each typically requiring ten revolver rounds, nine or ten rifle rounds, and two to eight shotgun rounds. Targets typically are steel plates that ring when hit, sometimes reactive targets such as steel knockdown plates or clay birds are used
35.
Winchester
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Winchester is a city and the county town of Hampshire, England. The city lies at the heart of the wider City of Winchester, a government district. It is situated 61 miles south-west of London and 13.6 miles from Southampton, at the time of the 2011 Census, Winchester had a population of 45,184. The wider City of Winchester district which includes such as Alresford. Winchester developed from the Roman town of Venta Belgarum, which in turn developed from an Iron Age oppidum. Winchesters major landmark is Winchester Cathedral, one of the largest cathedrals in Europe, with the distinction of having the longest nave and overall length of all Gothic cathedrals in Europe. The city is home to the University of Winchester and Winchester College, the area around Winchester has been inhabited since prehistoric times, with three Iron Age hillforts, Orams Arbour, St. Catherines Hill, and Worthy Down all in the nearby vicinity. In the Late Iron Age, an urban settlement type developed, known as an oppidum. It was overrun by the confederation of Gaulish tribes known as the Belgae sometime during the first century BCE and it seems to have been known as Wentā or Venta, from the Brittonic for town or meeting place. After the Roman conquest of Britain, the settlement served as the capital of the Belgae and was distinguished as Venta Belgarum, Venta of the Belgae. Although in the years of the Roman province it was of subsidiary importance to Silchester and Chichester. At the beginning of the century, Winchester was given protective stone walls. At around this time the city covered an area of 144 acres, there was a limited suburban area outside the walls. Like many other Roman towns however, Winchester began to decline in the fourth century. Ford identifies the community as the Cair Guinntguic listed by Nennius among the 28 cities of Britain in his History of the Britains, amid the Saxon invasions of Britain, cemeteries dating to the 6th and 7th centuries suggest a revival of settlement. The city became known as Wintan-ceastre in Old English, in 648, King Cenwalh of Wessex erected the Church of SS Peter and Paul, later known as the Old Minster. This became a cathedral in the 660s when the West Saxon bishopric was transferred from Dorchester-on-Thames, the citys first mint appears to date from this period. In the early tenth century there were two new establishments, the convent of Nunnaminster, founded by Alfreds widow Ealhswith
36.
Federal Premium Ammunition
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Federal Premium Ammunition, a wholly owned subsidiary of Vista Outdoor Inc. is located in Anoka, Minnesota. With a work force of nearly 1,500, Federal manufactures shotshell, centerfire, on April 27,1922, Charles L. Horn took control of a small plant in Anoka, Minnesota and refounded Federal Cartridge Corporation. Horn launched a plan that involved merchandising Federal products in grocery stores, barbers shops. In 1941, Federal earned a contract from the U. S. government to build. Federal ranked 59th among United States corporations in the value of World War II military production contracts, Horn introduced Federals Premium line of centerfire rifle and shotshell ammunition. Federal also owned Hoffman Engineering, a company that made electronic enclosures, in 1985, Federal was sold to a group of private investors including Kelso & Company, BancBoston Capital, and members of management. The two companies were united under the name Federal-Hoffman, Inc and taken private during the sale, Federal-Hoffman have since split, and Federal is currently owned by Vista Outdoor. Vista Outdoor group, formerly a group of outdoor and sporting companies owned by Alliant Techsystems, was spun off from Alliant Techsystems in February 2015, Federal Cartridge does business today as Federal Premium Ammunition. The HST380 Auto Micro was designed for self-defense and use in small pistols such as the Smith & Wesson Bodyguard and it has a nickel-plated casing and special primer that improve its reliability in semi-automatic handguns. It weighs 99 grains and has a deep, tapered hollow-point in order to provide consistent expansion and this ammunition does not meet the FBI Ammunition Testing Protocol. Using the same sized test barrel, it measures 235 foot-pounds of muzzle energy, hydra-Shok is a type of cartridge with expanding bullets made by. It was originally patented by Federal Premium bullet designer Tom Burczynski, hydra-Shok was introduced in 1988 after the FBI requested a bullet with better terminal ballistics than traditional cup and core projectiles. Hydra-Shok ammunition has a patented center-post design and notched jacket with a lead core. Together they are meant to more reliable expansion and deeper penetration than the other projectiles used at that time. Federal Premium claims that the jacket and center post design provide a programmed expansion. There has been debate regarding the bullets unreliable expansion when fired through clothing or media other than ballistic gelatin. Federal Premium announced a. 30-30 Winchester version of its Vital-Shok Trophy Copper ammunition for medium-sized game in August 2015 and these bullets are tipped with polymer inserts in order to effect rapid expansion and retain 99 percent of their mass after expanding. The one percent loss of mass is due mostly to shedding the polymer tip, the case of this cartridge is nickel-plated to make extraction easier and prevent corrosion
37.
Hollow-point bullet
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It is also used for controlled penetration, where over-penetration could cause collateral damage. Both of these goals are meant to maximize stopping power, jacketed hollow points or plated hollow points are covered in a coating of harder metal to increase bullet strength and to prevent fouling the barrel with lead stripped from the bullet. Plastic-tipped bullets are a type of bullet meant to confer the aerodynamic advantage of the spitzer bullet and this process is commonly referred to as mushrooming, because the resulting shape, a widened, rounded nose on top of a cylindrical base, typically resembles a mushroom. The greater frontal surface area of the expanded bullet limits its depth of penetration into the target and this jacket provides additional strength to the bullet, and can help prevent it from leaving deposits of lead inside the bore. In controlled expansion bullets, the jacket and other design characteristics help to prevent the bullet from breaking apart. For bullets designed for shooting, some such as the Sierra Matchking incorporate a cavity in the nose. Match or target hollow-point bullets are designed for target use. A hollow-point boat-tail bullet is a match-grade bullet design that uses the concept of a tail to give it a lower drag coefficient. Only the base of the bullet has a boat tail-like shape – the meplat is still pointed, some hollow-point boat-tail bullets with longer, more aerodynamic profiles are known as very-low-drag bullets. Terminal ballistics testing of hollow point bullets is generally performed in ballistic gelatin, or some other medium intended to simulate tissue, Test results are generally given in terms of expanded diameter, penetration depth, and weight retention. How these factors are interpreted depends on the use of the bullet. Solid lead bullets, when cast from an alloy, will often deform. This, combined with the velocity and penetration attainable with muzzleloading firearms. The first hollow-point bullets were marketed in the late 19th century as express bullets, in addition to providing increased velocities, the hollow also turned out to provide significant expansion, especially when the bullets were cast in a soft lead alloy. Originally intended for rifles, the popular. 32-20. 38-40, with the advent of smokeless powder, velocities increased, and bullets got smaller, faster, and lighter. These new bullets needed to be jacketed to handle the conditions of firing, the new full metal jacket bullets tended to penetrate straight through a target and produce little damage. This led to the development of the soft point bullet and later jacketed hollow-point bullets at the British arsenal in Dum Dum, designs included the.303 Mk III, IV & V and the.455 Mk III Manstopper cartridges. Although such bullet designs were quickly outlawed for use in warfare, in modern ammunition, the use of hollow points is primarily limited to handgun ammunition, which tends to operate at much lower velocities than rifle ammunition
38.
Soft-point bullet
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A soft-point bullet, also known as a soft-nosed bullet, is a jacketed expanding bullet with a soft metal core enclosed by a stronger metal jacket left open at the forward tip. A soft-point bullet is intended to expand upon striking flesh to cause a wound diameter greater than the bullet diameter, jacketed soft point is usually abbreviated JSP in the ammunition and reloading industry. Lead-alloy bullets used with gunpowder firearms were unsatisfactory at the bullet velocities available from rifles loaded with nitrocellulose propellants like cordite. The lead-alloy core was swaged into a cup of the metal covering the front and sides of the core. The bullet jacket may be described as an envelope, steel envelope, or hard envelope. Reversing the direction of jacket placement leaves the exposed core on the forward tip of the bullet creating a soft-point bullet. Soft-point bullets expose the soft lead-alloy core on the part of the bullet most likely to be deformed when striking a target. The sides of the bullet remain covered by the jacket to reliably impart stabilizing rotation from rifling, a core of pure lead is softer than a core of lead alloyed with metals like antimony and tin. Some jacket alloys have greater strength than others, and, for any given alloy and annealing process. Energy available to expand the bullet is proportional to the square of the velocity at which the bullet strikes the target, if the bullet passes through the target, the energy represented by the square of the velocity of the departing bullet has no effect on the target. Soft point bullets may not expand if they strike a target at low velocity, varmint rifle bullets with thin jackets are intended to expand rapidly and disintegrate upon encountering minimum resistance. Bullets intended for hunting are designed to increase their forward diameter while remaining intact to penetrate deeply enough to damage internal organs likely to cause rapid death. Big-game bullets sometimes have a specialized jacket including a center baffle between a forward core intended to expand and another core intended to remain intact. Alternative designs include a jacket with a thicker belt around the central part of the bullet intended to resist expansion while the thinner forward part of the bullet jacket ruptures. Some bullets have a formed from a soft alloy in the forward part of the bullet bonded to a harder alloy core in the rear of the bullet. Others have a jacket which is thicker near the base of the bullet, soft-point bullets are similar to jacketed hollow-point bullets, because both have a jacket open on the forward tip. Bullets with an amount of core exposed forward of the jacket might have a hollow point within that core. Jacketed flat point may describe either soft-point or full metal jacket bullets with a flat, until recently, flat-point bullets were required in centerfire rifles with tubular magazines, such as the Winchester rifle, where the rounds are stored front-to-back
39.
Table of handgun and rifle cartridges
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Table of selected handgun, submachine gun, rifle and machine gun cartridges by common name. Data values are the highest found for the cartridge, and might not occur in the same load, number of manufacturers currently producing complete cartridges - e. g. Norma, RWS, Hornady, Winchester, Federal, Remington, Sellier&Bellot, Prvi Partizan. May be none for obsolete and wildcat cartridges, a guide to the recoil from the cartridge, and an indicator of bullet penetration potential. The. 30-06 Springfield is considered the limit for tolerable recoil for inexperienced rifle shooters
40.
Wayback Machine
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The Internet Archive launched the Wayback Machine in October 2001. It was set up by Brewster Kahle and Bruce Gilliat, and is maintained with content from Alexa Internet, the service enables users to see archived versions of web pages across time, which the archive calls a three dimensional index. Since 1996, the Wayback Machine has been archiving cached pages of websites onto its large cluster of Linux nodes and it revisits sites every few weeks or months and archives a new version. Sites can also be captured on the fly by visitors who enter the sites URL into a search box, the intent is to capture and archive content that otherwise would be lost whenever a site is changed or closed down. The overall vision of the machines creators is to archive the entire Internet, the name Wayback Machine was chosen as a reference to the WABAC machine, a time-traveling device used by the characters Mr. Peabody and Sherman in The Rocky and Bullwinkle Show, an animated cartoon. These crawlers also respect the robots exclusion standard for websites whose owners opt for them not to appear in search results or be cached, to overcome inconsistencies in partially cached websites, Archive-It. Information had been kept on digital tape for five years, with Kahle occasionally allowing researchers, when the archive reached its fifth anniversary, it was unveiled and opened to the public in a ceremony at the University of California, Berkeley. Snapshots usually become more than six months after they are archived or, in some cases, even later. The frequency of snapshots is variable, so not all tracked website updates are recorded, Sometimes there are intervals of several weeks or years between snapshots. After August 2008 sites had to be listed on the Open Directory in order to be included. As of 2009, the Wayback Machine contained approximately three petabytes of data and was growing at a rate of 100 terabytes each month, the growth rate reported in 2003 was 12 terabytes/month, the data is stored on PetaBox rack systems manufactured by Capricorn Technologies. In 2009, the Internet Archive migrated its customized storage architecture to Sun Open Storage, in 2011 a new, improved version of the Wayback Machine, with an updated interface and fresher index of archived content, was made available for public testing. The index driving the classic Wayback Machine only has a bit of material past 2008. In January 2013, the company announced a ground-breaking milestone of 240 billion URLs, in October 2013, the company announced the Save a Page feature which allows any Internet user to archive the contents of a URL. This became a threat of abuse by the service for hosting malicious binaries, as of December 2014, the Wayback Machine contained almost nine petabytes of data and was growing at a rate of about 20 terabytes each week. Between October 2013 and March 2015 the websites global Alexa rank changed from 162 to 208, in a 2009 case, Netbula, LLC v. Chordiant Software Inc. defendant Chordiant filed a motion to compel Netbula to disable the robots. Netbula objected to the motion on the ground that defendants were asking to alter Netbulas website, in an October 2004 case, Telewizja Polska USA, Inc. v. Echostar Satellite, No.02 C3293,65 Fed. 673, a litigant attempted to use the Wayback Machine archives as a source of admissible evidence, Telewizja Polska is the provider of TVP Polonia and EchoStar operates the Dish Network
41.
Smith & Wesson Model 1
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The Smith & Wesson Model 1 was the first firearm manufactured by Smith & Wesson, with production spanning the years 1857 through 1882. It was the first commercially successful revolver to use rimfire cartridges instead of powder, musket ball. It is a single-action, tip-up revolver holding seven.22 Short black powder cartridges, as Samuel Colts patent on the night revolver was set to expire in 1856, Horace Smith and Daniel B. Wesson were researching a prototype for a cartridge revolver. Rather than make White a partner in their company, Smith and it would become Whites responsibility to defend his patent in any court cases which eventually led to his financial ruin, but was very advantageous for the new Smith & Wesson Company. The Model 1 had three issues or major variants, with each subsequent issue introducing significant technical changes, the 1st Issue of the Model 1 was the first major iteration, with approximately 12,000 produced over a three year period. There are six variations of the Model 1, first identified in an article by John Kountz in the April 1956 issue of The Gun Report. In this article, Kountz noted specific differences in the shield, the barrel latch. Serial numbers were issued sequentially for the Model 1 1st Issues ranging from 1 through approximately 12,000, the 2nd Issue of the Model 1 looked similar to the 1st Issue, with several notable differences. The side plate on the 2nd Issue was much larger and irregularly shaped, the profile of the frame was flatter, and the hammer was now made in one piece. Model 1 2nd Issues still had the flared, square cornered shaped grip and the octagonal tip-up style frame, there are several variations of the 2nd Issue guns. Variants between serial numbers 12,000 through to about 20,000 involve the shape of the plate, the design of the trigger spring. There was also a decrease in the size of the barrel roll stamps at around serial number 95,000, 2nd Issue marked 2D QUALTY are also seen occasionally. There were approximately 110,000 2nd Issues produced from 1860 through 1868, the Model 1, 3rd Issue represented a substantial redesign for the Model 1, with a fluted cylinder, a round barrel and a rounded birds head style grip. Finishes included full nickel plating, full blued steel, and a half plate nickel/blue combo, variants include the square and triangular top strap design that changed around serial number 9,500. The 3rd Issue guns were produced from 1868 through 1882 with serial numbers from 1 through approximately 131,000 and this popularity led to numerous knockoffs and patent infringements by other armsmakers. Rolin White and S&W brought infringement cases against Manhattan Firearms Company, Ethan Allen, Merwin & Bray, National Arms Company, the courts mostly allowed these manufacturers to continue production runs, with a royalty on each revolver paid to White. In some cases, Smith & Wesson bought the back to remark and sell
42.
Smith & Wesson Model 1 1/2
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Chambered in.32 Rimfire, its cylinder held 5 shots. It was produced in three varieties from 1865 through 1892, with production exceeding 223,000. The Model 1 1/2 had three issues, the first issue of the Model 1 1/2 can be identified by its smooth cylinder, and the square shape of the grip butt. Models were available in blued or nickel-plated finishes, and the majority were produced with 3 1⁄2-inch barrels, a less common 4-inch barrel variety was also sold. Serial numbers range from 1 through to approximately 26,300, the second issue of the Model 1 1/2 can be identified by its fluted barrel and the rounded shape of the grip butt. Like the 1st Issue, it was produced in blued steel and nickel-plated varieties. 2nd Issue guns were numbered consecutively after the 1st Issue. There is also a transitional model 2nd issue that uses the unfluted 1st issue barrels, the serial numbers for these transitional models span approximately 27,200 through 28,800. The third issue of the Model 1 1/2 is known as the Model No.1 1/2 Single Action Revolver and it differs substantially from the first two issues by breaking at the top, consistent with the design of the Safety Hammerless or S&W.38 Single Action. The grip is rounded at the butt, and is similar in appearance to that on the 2nd Issue and this revolver marked the debut of the.32 S&W centerfire cartridge. Serial numbers ranged from 1 to approximately 97,500
