.22 ILARCO
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| .22 Winchester Short Magnum | |
|---|---|
 .22 Short Magnum (right) compared to .22 WMR | |
| Type | Rimfire |
| Place of origin | United States |
| Production history | |
| Designed | 1987[1] |
| Manufacturer | Winchester |
| Specifications | |
| Parent case | .22 WMR |
| Bullet diameter | .224 in (5.7 mm) |
| Neck diameter | .242 in (6.1 mm) |
| Base diameter | .242 in (6.1 mm) |
| Rim diameter | .294 in (7.5 mm) |
| Rim thickness | .050 in (1.3 mm) |
| Case length | .669 in (17.0 mm) |
| Overall length | 0.950 in (24.1 mm) |
| Primer type | Rimfire |
The .22 Winchester Short Magnum Rimfire, also called .22 ILARCO,[2] was a rimfire cartridge designed for the American-180 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 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[]
References[]
- ^ "Rimfire Small Arms Rounds". Retrieved 26 July 2020.
- ^ "THE CARTRIDGE COLLECTOR". Archived from the original on 6 February 2018. Retrieved 26 July 2020.
- Pistol and rifle cartridges
- Rimfire cartridges
- Weapons and ammunition introduced in 1987