The Below Information Has Been Provided From Our Gun Caliber Dictionary And Is Meant For Informational Purposes Only. It Is Not Intended to Describe The Unique Specifications For This Ammunition.
The 45 Auto Rim is a rimmed version of the 45 ACP introduced in 1920 for revolvers chambered for the 45 ACP cartridge. The 1917 Colt revolver in 45 ACP was a World War I accommodation due to inadequate supplies of 1911 pistols. The military used "half moon" clips with 45 ACP cartridges in these revolvers because, if single-loaded, rimless 45 ACP cases must be extracted manually. The 45 Auto Rim solved this problem, and is still manufactured by Cor-Bon. Ballistics are the same as the 45 ACP: 230-grain bullet at 805 feet per second. Many 1917 revolvers are still in use and some modern revolvers have been chambered to 45 ACP and half-moon clips are available...but 45 Auto Rim cartridges and cases are simpler for casual shooting. — Craig Boddington
