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The prototype for the .220 Swift was developed in 1934–35 by Grosvenor Wotkyns who necked down the .250-3000 Savage as a means of achieving very high velocities. However the final commercial version developed by Winchester is based on the 6mm Lee Navy cartridge necked down, but besides inheriting headspacing on its rim from the parent, a feature already considered obsolete by 1930s, the ...
In some instances, the powder may not have even been fully burned in guns with short barrels. So, the muzzle velocity of a 2-inch (51 mm) barrel is less than that of a 4-inch (100 mm) barrel, which is less than that of a 6-inch (150 mm) barrel. Large naval guns will have high length-to-diameter ratios, ranging between 38:1 to 50:1. This length ...
The first black powder cartridge adopted in large numbers by the Japanese Army, it was used in the Murata rifle, a hybrid of French Gras and German Mausers 1871 and 1871/84 rifles. 12.7×108mm: 1930 USSR R 12.7×108mm 2700 11980 (13737) 255 0.511 108mm Used in Heavy Machine Guns, AT-rifles [36] and anti-materiel rifles. 14.5×114mm: 1941 [37 ...
.223 Remington – Original AR-15 cartridge: .223 cartridges may function in a 5.56×45mm rifle, however 5.56×45mm cartridges may produce excessive pressure in a .223 Rem rifle. On the other hand, a .223 Wylde chamber is used on .223 Rem rifle barrels to allow them to safely fire either .223 Remington or 5.56×45mm NATO ammunition. [6]
The .257 Roberts, also known as .257 Bob, [2] is a medium-powered .25 caliber rifle cartridge.It has been described as the best compromise between the low recoil and flat trajectory of smaller calibers such as the 5 mm (.22 in) and 6 mm (.24 in), and has more energy, but is harder recoiling, similar to larger hunting calibers, such as the 7 mm (.28 in) and 7.62 mm (.30 in).
The standard .25-35 Winchester load is about three times as powerful in muzzle energy as the .25-20 Winchester, a cartridge of similar bore size earlier introduced by Winchester. [3] The .25-35 was valued for its speed, trajectory, and lower recoil. [4] It was a popular round in the Winchester Model 1885 High Wall single-shot rifle.
The .25 Remington (also known as the .25 Remington Auto-Loading) is an American rifle cartridge. A rimless, smokeless powder design, this cartridge was considered to be very accurate by period firearm experts and suitable for game up to deer and black bear. [1] It was based on the .30 Remington cartridge. [2]
The 25 WSSM has similar ballistics to the .25-06 but in a much shorter case. It is a necked-up version of the .243 WSSM , [ 1 ] which is in turn a shortened .300 WSM ( Winchester Short Magnum ). The WSSM cartridges are based on ballistics design philosophies that are intended to produce a high level of efficiency.