The .22 Winchester Short Magnum Rimfire, also called .22 ILARCO or .22 American,
was a
rimfire cartridge designed for the
American-180
The American-180 is a submachine gun developed in the 1960s which fires .22 LR cartridges from a pan magazine. The concept began with the Casull Model 290 that used a flat pan magazine similar to designs widely used prior to World War II. Only ...
rimfire submachine gun. At the time the cartridge was created, the design of the American-180 had been taken over by the Illinois Arms Company, Inc., hence the ILARCO name.
History
Sometime after the Illinois Arms Company, Inc. (ILARCO) purchased the rights to the American-180 they determined a more powerful cartridge would be appropriate, which resulted in the creation of the .22 Magnum Short. The new cartridge was designed so that a simple change of barrel was all that was required to switch between standard .22 Long Rifle, for which the gun was designed, and the new cartridge.
Dimensions and loading
The .22 Short Magnum uses a shorter version of the
.22 WMR case with the same 40 grain projectile as the original .22 WMR loading.
See also
*
5 mm caliber
This is a list of firearm cartridges which have bullets in the caliber range.
*''Length'' refers to the cartridge case length.
*''OAL'' refers to the overall length of the cartridge.
All measurements are in mm (in).
Rimfire cartridges
Pi ...
*
List of rimfire cartridges
Below is a list of rimfire cartridges, ordered by caliber, small to large. Rimfire ammunition is a type of metallic cartridge whose primer is located within a hollow circumferential rim protruding from the base of its casing.
Among the most com ...
References
{{Reflist, 30em
Pistol and rifle cartridges
Rimfire cartridges
Weapons and ammunition introduced in 1987