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The .219 Zipper / 5.7x49mmR cartridge was created by Winchester Repeating Arms in 1937 to be used in their lever-action Model 64 rifle. It is a 30-30 Winchester cartridge necked down to a .22 caliber bullet. Marlin Firearms also offered their Marlin Model 336 rifle (Marlin 336 Zipper) chambered for the cartridge.
The .219 Donaldson Wasp / 5.7x44mmR intermediate cartridge was developed during the late 1930s by Harvey Donaldson, and is derived from the .219 Zipper case. Cases have been formed from .25-35 Winchester , .30-30 Winchester , and .22 Savage Hi-Power brass. [ 1 ]
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.
Reloading dies for the round are readily available. The .225 Winchester's case is a parent case for some of SSK Industries ' [ 3 ] popular line of JDJ cartridges designed by J.D. Jones , chosen for its strength and semi-rimmed design which makes it well suited for use in break-open actions.
The cartridge was introduced as a commercial cartridge by Winchester in 1937 in their Model 65 lever action rifle, which was also chambered for the .25-20 and .32-20 Winchester cartridges. However, while the .25-20 and the .32-20 Model 65 rifles have 22-inch (560 mm) barrels, the rifles chambered for the Bee have 24-inch (610 mm) barrels.
The .375 SOCOM is a fairly new cartridge, designed by Tromix in 2013. Taking a .458 SOCOM cartridge case and sizing the neck down to .375 caliber, resulted in a hard hitting AR-15 compatible cartridge, that has a considerable velocity and range advantage over the .458 SOCOM as well as other big bore AR-15 cartridges.
400 pound Tiger taken by Reverend H. R. Caldwell using a Savage Model 99 chambered for .22 Savage Hi-Power. The .22 Savage Hi-Power's relatively high velocity for the time and "shocking" power led to an initial surge of popularity, and was attributed with almost magical killing powers even on large and dangerous soft-skinned game such as tigers.
The cartridge is a necked-up version of the .22 PPC which is in turn based on a .220 Russian (5.6×39mm). [5] The standard bullet diameter for 6 mm caliber cartridges is .243 inches (6.2 mm), the same diameter used in the .243 Winchester and 6mm Remington cartridges.