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The .22-250 Remington / 5.7x48mm is a very high-velocity, short action, .22 caliber rifle cartridge primarily used for varmint hunting and small game hunting. It is capable of reaching over 4,000 feet per second.
Parker Otto Ackley (May 25, 1903 – August 23, 1989) [1] was an American gunsmith, barrel maker, author, columnist, and wildcat cartridge developer. The Ackley Improved family of wildcat cartridges are designed to be easily made by rechambering existing firearms, and fireforming the ammunition to decrease body taper and increase shoulder angle, resulting in a higher case capacity.
Common rifle cartridges, from the largest .50 BMG to the smallest .22 Long Rifle with a $1 United States dollar bill in the background as a reference point.. This is a table of selected pistol/submachine gun and rifle/machine gun cartridges by common name.
It is currently the fastest production .22 caliber round in the world with muzzle velocities as high as 4,600 feet per second (1,402 meters per second). However, the .220 Swift still holds the record as the fastest .22 caliber centerfire cartridge with a published velocity of 4,665 ft/s (1,422 m/s) using a 29-grain (1.9 g) projectile and 42 ...
Typical varmint rifle cartridges on a 0.25-inch (6 mm) grid (from left to right): .22 long rifle for very small animals at ranges less than 100 meters, .22-250 represents the high velocity .22 calibers for longer range shooting, and .25-06 for larger animals at ranges up to 400 meters.
The .22 Savage Hi-Power cartridge, also known as 5.6×52mmR, was created by Charles Newton and introduced by Savage Arms in 1912. It was designed to be used in the Savage Model 99 hammerless lever action rifle .
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 ...
The maximum SAAMI pressure level for the .221 Fireball is 52,000 C.U.P. as compared to 46,000 C.U.P. for the .222 Remington. The purpose of the increased pressure was to allow it to perform more effectively in the shorter barrel of the XP-100. The .221 Fireball produces the highest velocity of any commercial pistol cartridge. [4]