1.
.300 AAC Blackout
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300 AAC Blackout, SAAMI short name 300 BLK, also known as 7. 62×35mm is a rifle cartridge developed in the United States by Advanced Armament Corporation for use in the M4 carbine. Its purpose is to achieve ballistics similar to the 7. 62×39mm Soviet cartridge in an AR-15 while using standard AR-15 magazines at their normal capacity. Care should be not to use 300 BLK ammunition in a rifle chambered for. 223/5.56 or 7. 62×40mm Wilson Tactical. In an effort to satisfy this need, the 300 AAC Blackout was developed and it can be seen as a SAAMI-certified version of Jones Wildcat.300 Whisper. Meeting these goals allowed the development team to many of the perceived drawbacks inherent to other large caliber cartridges when used in the M4. Colt Firearms and other makers had previously chambered AR-pattern rifles and carbines in various.30 caliber rounds. Rounds such as the 6.8 SPC and 6.5 Grendel had similar part-interchangeability issues,300 AAC BLACKOUT was approved by SAAMI on January 17,2011. On October 23,2011, SSG Daniel Horner of the USAMU used 300 AAC Blackout to win his 4th USPSA Multi Gun National Championship. In July 2015, the Netherlands Defense Material Organization issued a tender for 195 carbines chambered in 300 BLK on behalf of the Dutch Maritime Special Operations Force, plans are to purchase ball, subsonic and lead-free frangible cartridges representing the first formal military adoption of the 300 BLK. Maximum estimated Combat effective range = *460 meters 125 grain supersonic, maximum effective range tested =800 Meters. The Barnes 110 TAC-TX expands out to 300 Meters from a 9 barrel and is a Law Enforcement and military round with barrier blind capability. 200 meters 220 grain subsonic The 300 AAC Blackout was designed to achieve energies similar to the 7. 62×39mm Soviet in an AR-15 while using standard AR magazines at their full capacity. The 7.62 Soviets cartridge taper prevented reliable feeding in AR magazines, from the 14.5 in barrel of the M4 Carbine, the M8555. 56×45mm round has an effective point target range of 500 meters. The bullet has significant drop, drift, and energy loss at that distance, from a 16 in barrel, a 125 gr 300 BLK round has a lower velocity and similar bullet drop and drift at shorter distances. However, it has the amount of energy at 700 meters that the M855 has at 500 meters. In terms of hit probability, the Blackout has a range of 460 meters. From a 9 in barrel, the 125 gr BLK round has the same energy as the M855 from the M4. In comparison with 7. 62×39mm rounds,300 BLK rounds with varying loads have a ballistic coefficient

2.
.300 Winchester Magnum
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The.300 Winchester Magnum is a belted, bottlenecked magnum rifle cartridge that was introduced by Winchester Repeating Arms Company in 1963. The.300 Winchester Magnum is a cartridge designed to fit in a standard rifle actions. It is based on the.375 H&H Magnum, which has blown out, shortened. The.300 Winchester is extremely versatile and has been adopted by a range of users including hunters, target shooters, military units. It is a selection for hunting moose, elk. Military and law enforcement departments adopted the cartridge for long range sniping, as a testament to its accuracy, since its introduction it has gone on to win several 1, 000-yard competitions. Prior to the design of the.300 Winchester Magnum there were several cartridges that provided what could be best described as a level of energy. The heritage of.30 caliber magnums can be traced back to the.30 Newton in 1913, beginning with the.270 Weatherby Magnum in 1943, Roy Weatherby introduced a line of cartridges based on a standard length magnum case. This was accomplished by taking the.30 Super Belted Rimless H&H case and having it blown out and shortened so that it could be cycled through a standard length bolt-action rifle. Then in 1944 he designed the.300 Weatherby Magnum, which essentially was a version of the.30 Super Belted Rimless H&H. The Weatherby’s standard length magnum case was soon noticed, in 1958 Winchester introduced three cartridges – the.264 Winchester Magnum.338 Winchester Magnum and the.458 Winchester Magnum, all based on the shortened and blown out.375 H&H Magnum case. The popular.30 caliber’s omission from that lineup was not missed, the.300 Winchester Magnum was introduced in 1963 by Winchester for use in the Model 70 rifle. The introduction of the.300 Winchester Magnum was not unforeseen, rather, its introduction was anticlimactic. Winchester developed the.300 Winchester Magnum by taking the.338 Winchester Magnum, which was introduced in 1958 and this caused the cartridge to have a neck shorter than the diameter of the bullet. There has been speculation that if the cartridge was released earlier. Since its introduction the cartridge has remained extremely popular, the.300 Winchester Magnums high availability in popular rifles such as Winchesters Model 70 and Remington Model 700 made the cartridge a popular choice among the shooting public. Although the.300 H&H Magnum. 30-338 Winchester Magnum and the.308 Norma Magnum had a start on the.300 Winchester Magnum these cartridges soon faded into obsolescence. Only the.300 Winchester Magnum was to survive as a readily available cartridge, other cartridges, while available, are more expensive

3.
Batting average
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Batting average is a statistic in cricket, baseball, and softball that measures the performance of batsmen in cricket and batters in baseball. The development of the statistic was influenced by the cricket statistic. In cricket, a batting average is the total number of runs they have scored divided by the number of times they have been out. The number is also simple to interpret intuitively, if all the batsmans innings were completed, this is the average number of runs they score per innings. If they did not complete all their innings, this number is an estimate of the average number of runs they score per innings. Batting average has been used to gauge cricket players relative skills since the 18th century, most players have career batting averages in the range of 20 to 40. This is also the range for wicket-keepers, though some fall short. All-rounders who are more prominent bowlers than batsmen typically average something between 20 and 30,15 and under is typical for specialist bowlers. Under this qualification, the highest Test batting average belongs to Australias Sir Donald Bradman, given that a career batting average over 50 is exceptional, and that only four other players have averages over 60, this is an outstanding statistic. The fact that Bradmans average is so far above that of any other cricketer has led several statisticians to argue that, statistically at least, he was the greatest sportsman in any sport. As at 21 October 2016, Adam Voges of Australia has recorded an average of 72.75 from 27 innings played and it should also be remembered, especially in relation to the ODI histogram above, that there were no ODI competitions when Bradman played. If their scores have a geometric distribution then total number of runs scored divided by the number of times out is the maximum likelihood estimate of their true unknown average, Batting averages can be strongly affected by the number of not outs. A different, and more developed, statistic which is also used to gauge the effectiveness of batsmen is the strike rate. It measures a different concept however – how quickly the batsman scores – so it does not supplant the role of batting average and it is used particularly in limited overs matches, where the speed at which a batsman scores is more important than it is in first-class cricket. Table shows players with at least 20 innings completed, in baseball, the batting average is defined by the number of hits divided by at bats. It is usually reported to three places and read without the decimal, A player with a batting average of.300 is batting three-hundred. A point is understood, in only, to be.001. If necessary to break ties, batting averages could be taken beyond the.001 measurement, henry Chadwick, an English statistician raised on cricket, was an influential figure in the early history of baseball