1.
Weatherby
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Weatherby, Inc. is an American gun manufacturer founded in 1945 by Roy Weatherby. The company is best known for its high-powered magnum cartridges, such as the.257 Weatherby Magnum,270 Weatherby Magnum.300 Weatherby Magnum.340 Weatherby Magnum, company headquarters is in the northern San Luis Obispo County town of Paso Robles, California. The original production rifles by Roy Weatherby were built on commercial Mauser actions by FN, Brevex, for bespoke rifles, Weatherby would build to a customers specifications, using any action the customer wanted, provided it was strong enough for the desired cartridge. For many years, Weatherby manufactured his rifles at his facility in South Gate. But in 1956, he contracted with Sako to build his production rifles on Weatherby-FN Mauser actions, custom rifles were still produced in South Gate, however. Weatherbys first break with Mauser actions came in 1956 when he commissioned the Danish firm of Schultz & Larsen to build 378 Weatherby Magnums utilizing their Model 54 bolt action and this action was very stout and featured four rear locking lugs. Many of its features would find their way into Weatherbys proprietary bolt action, built to withstand the hottest of Weatherbys experimental cartridges. The first Weatherby Mark V actions were manufactured in the U. S. by Pacific Founders, Inc. demand for the Mark V quickly exceeded Weatherbys manufacturing capability, so the company contracted with J. P. Sauer in West Germany to build production Mark V rifles. Manufacturing of the Mark V remained there until the early 1970s when material, some say the machining and finishing of the Howa made Mark Vs was actually better than the Sauer made guns. In 1995, manufacturing of the Mark V was moved back to the United States, the Mark V action remained relatively unchanged during the first five years of production. Shortly after, manufacturing moved from PFI in the U. S. to J. P. Sauer in Germany, in addition, the safety was redesigned and moved from the receiver to the bolt, which was changed from a smooth to a fluted surface. The first major change came in 1963 when Weatherby designed a shorter and more trim Mark V action for their 224 Weatherby Magnum varmint round, the bolt in this smaller Mark V action only had six locking lugs, versus the nine found on its bigger brother. Rifles chambered for the new 224 Wby Magnum were dubbed Varmintmaster, the Varmintmaster was later offered in 22-250 Remington, making this the first non-Weatherby cartridge offered in the Mark V. In 1967, the 9-lug Mark V action was offered for the first time in 30-06 and these two cartridges, the 30-06 and 22-250, remained the only two non-Weatherby chamberings offered in production Mark V rifles until the mid-1990s. Today, all standard calibers are only offered in 6-lug versions of the action. This makes 9-lug, 30-06 Mark Vs somewhat of a rarity, in the late 1960s, Weatherby contracted with Howa of Japan to build a Weatherby rifle that would be more affordable for the average hunter. The result was the Weatherby Vanguard which was introduced in 1970, the Vanguard is now available in select Weatherby magnum calibers. Today, Weatherby still offers only two lines of centerfire rifles, the Mark V and the Vanguard, the Mark V barreled action is manufactured by ATEK in Brainerd, MN while the barrel and action for the Vanguard are still manufactured by Howa in Japan
2.
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
3.
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
4.
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
5.
.416 Rigby
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The.416 Rigby or 10. 6×74mm was designed in 1911 by John Rigby, of John Rigby & Company, as a dangerous game cartridge. It is the first to use a bullet with a diameter of 10.6 millimetres, the rifles, as built by John Rigby & Co. Other famous users of the cartridge were Commander David Enderby Blunt, John Taylor, two major developments at the turn of the 20th century set the course for the development of the.416 Rigby as a successful rifle cartridge. The first was the development of cordite in the United Kingdom in 1889, prior to the invention of cordite, rifles used gunpowder as a propellant. Due to the characteristics of black powder it did not produce high pressures. Big-bore cartridges of the era were the 4-bore, 6-bore and 8-bore rifles cartridges, sub 12. 7-millimetre caliber were considered small-bore cartridges. The development of smokeless powder revolutionized the rifle, one version of this smokeless powder developed in the U. K. was cordite which allowed higher pressures to be developed and thereby increasing the velocity of bullets. The invention of smokeless powder rendered the big bore rifles of the era obsolete, with the emergence of cordite as a propellant what was considered a big bore cartridge changed to any cartridge having a caliber of over 11.6 millimetres. The switch during World War I to modern smokeless powders would cause what constituted a big bore to be refined to mean any cartridge over 10.2 millimetres. The next improvement was the development of the Gewehr 98 rifle by Paul Mauser, the rifle design would go on to become the most common and successful rifle design in the history of firearms. During World War II most Axis and Allied nations with the exception of the British, and the Russians used rifles based on the Mauser 98 action. Today this is still the most popular design and is used to this day by Mauser, Dumoulin-Herstal, CZ, Holland & Holland, Kimber, Rigby. The Mauser 98 action provided the consumers and gun makers an inexpensive alternative to the double and single shot rifles which until that time predominated the dangerous game hunting scene. At the turn of the 20th Century, three major British rifle manufacturers, Jeffery, Westley-Richards and John Rigby & Co, the result was the.404 Jeffery.425 Westley-Richards and the.416 Rigby. While these cartridges were considered to be the new medium bore cartridges during their day, the performance of these cartridges was due to the sectional density and higher velocity. The first.416 Rigby rifles used the Magnum Mauser Square Bridge No.5 action, the large bolt face and the length of the Magnum Mauser No.5 action was easily adopted for use with the.416 Rigby cartridge. As the Magnum Mauser action became scarcer after World War II.416 Rigby rifles were built on Enfield P-17, both the BRNO and the Enfield P-17 actions are in turn based on the Mauser 98 rifle. After World War II with the dwindling of areas to hunt dangerous game, interest in the.416 Rigby cartridge, between 1912 and the beginning of World War II, John Rigby & Co. produced 169.416 Rigby rifles and 180 between 1939 and 1984
6.
.375 H&H Magnum
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The.375 Holland & Holland Magnum is a medium-bore rifle cartridge. The.375 H&H was only the second ever to feature a belt. On these new rimless cartridges the belt replaced the rim in ensuring the correct headspace, the British company Holland & Holland introduced the cartridge in 1912 as the.375 Belted Rimless Nitro-Express. It initially used cordite propellant which was made in long strands – hence the shape of this cartridge. The.375 H&H often is cited as one of the most useful all-round rifle cartridges, especially in shooting large and dangerous game. In many regions with thick-skinned dangerous game animals, the.375 H&H is seen as the minimum acceptable caliber, and in many places it is now the legal minimum for hunting such game. African game guides, professional hunters, and cullers of dangerous game have repeatedly voted the.375 H&H as their preference for an all-round caliber if they could only have one rifle. The 9. 5×57mm Mannlicher–Schönauer cartridge had a influence on British rifle manufacturers and was soon adopted by Westley Richards. In an effort to compete, Holland & Holland introduced the. 400/375 Belted Nitro Express, the. 400/375 H&H as it is sometimes known was the first cartridge manufactured to feature a belt. The addition of a belt to a cartridge design provided the advantage of allowing for correct headspacing of highly tapered cartridges. The introduction of the 9. 3×62mm Mauser cartridge in 1905 had a profound, compared to the British double rifles, the Mauser was a far cheaper rifle to manufacture and therefore cheaper to acquire. The double rifles gained little from industrialization whereas the Mauser rifles had gained from production due to contracts to produce military rifles for many countries. The result was cheap magazine rifles capable of firing one of the very best candidates for the all round hunting cartridge in Africa. The influence of Mausers 98 action should not be understated, British gunmakers such as Rigby were purchasing the Mauser 98 actions for use in their own rifles with their own cartridges. The 9. 3×62mm demonstrated that it was adequate for everything from the Elephant to the dik-dik and had acquired a reputation to match and this trend did not go unnoticed by British rifle manufacturers. Secondly, the cartridge would require a high velocity so as to provide this penetration at extended ranges, the high velocity of the cartridge would have the added advantage of serving as a marketing tool. Thirdly, the cartridge must function reliably through a rifle in tropical conditions. Holland & Holland had determined that to provide adequate penetration a bullet with the sectional density similar to the 9. 3×62mm required impact velocities of about 2,150 ft/s, drawing from anecdotal evidence of hunters it was also determined that high velocities provided impressive kills on game
7.
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
8.
Gram
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The gram is a metric system unit of mass. Originally defined as the weight of a volume of pure water equal to the cube of the hundredth part of a metre. The only unit symbol for gram that is recognised by the International System of Units is g following the numeric value with a space, the SI does not support the use of abbreviations such as gr, gm or Gm. The word gramme was adopted by the French National Convention in its 1795 decree revising the system as replacing the gravet introduced in 1793. Its definition remained that of the weight of a centimetre of water. French gramme was taken from the Late Latin term gramma and this word, ultimately from Greek γράμμα letter had adopted a specialised meaning in Late Antiquity of one twenty-fourth part of an ounce, corresponding to about 1.14 grams. This use of the term is found in the carmen de ponderibus et mensuris composed around 400 AD, the gram was the fundamental unit of mass in the 19th-century centimetre–gram–second system of units. The gram is today the most widely used unit of measurement for non-liquid ingredients in cooking and grocery shopping worldwide. 1 gram =15.4323583529 grains 1 grain =0.06479891 grams 1 avoirdupois ounce =28.349523125 grams 1 troy ounce =31.1034768 grams 100 grams =3.527396195 ounces 1 gram =5 carats 1 gram =8. 1 gram is roughly equal to 1 small paper clip or pen cap, the Japanese 1 yen coin has a mass of one gram. Conversion of units Duella Gold gram Orders of magnitude Gram at Encyclopædia Britannica
9.
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
