Automatic Colt Pistol

Automatic Colt Pistol (ACP) denotes various John Browning cartridge designs primarily used in Colt and Fabrique Nationale de Herstal pistols. All of these cartridges appear similar with straight sides. The .25 ACP, .32 ACP and .38 ACP are semi-rimmed and headspace on the rim, while the rimless .380 ACP and .45 ACP headspace on the mouth of the case.

Read more about Automatic Colt Pistol:  ACP Cartridges, History

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