.22 ILARCO
 | This article needs additional citations for verification. (July 2020) |
| .22 Winchester Short Magnum | ||||||||
|---|---|---|---|---|---|---|---|---|
 .22 WMR (left) compared to .22 ILARCO (right) | ||||||||
| Type | Rifle | |||||||
| Place of origin | United States | |||||||
| Production history | ||||||||
| Designed | 1987[1] | |||||||
| Manufacturer | Winchester | |||||||
| Specifications | ||||||||
| Parent case | .22 WMR | |||||||
| Case type | Rimmed, straight | |||||||
| 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 | .950 in (24.1 mm) | |||||||
| Primer type | Rimfire | |||||||
| Ballistic performance | ||||||||
| ||||||||
The .22 ILARCO / 5.7x24mmRF, also known as the .22 Winchester Short Magnum Rimfire or .22 American,[2][3] was a rimfire cartridge designed in 1987 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
[edit]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 ILARCO. 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
[edit]The .22 ILARCO uses a shorter version of the .22 Winchester Magnum Rimfire case, which use the same 40 gr (2.6 g) projectile as the original .22 Winchester Magnum Rimfire cartridge.
See also
[edit]References
[edit]- ^ "Rimfire Small Arms Rounds". Retrieved 26 July 2020.
- ^ "THE CARTRIDGE COLLECTOR". Archived from the original on 6 February 2018. Retrieved 26 July 2020.
- ^ Barnes, F. C., & Woodard, W. Todd. (2016). Cartridges of the world, 15th edition: A complete and illustrated reference for more than 1500 Cartridges. Gun Digest.