The .45 ACP (AKA: .45 Automatic, .45 Auto Colt Pistol, 11.43x23mm,11.45x24mm, .45 Automatic 1908, 11.25mm Norway, 11.25mm Norwegian Colt, .45 Auto) is a Center Fire cartridge with a Bullet Diameter of 0.452 in” (11.48mm) that is primarily used in Pistols. The .45 ACP originated in The United States in 1904. The .45 ACP also has a case length of 0.898 in” (22.81mm) and an overall length of 1.275 in” (32.39mm).
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