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The .45 ACP (Automatic Colt Pistol), also known as .45 Auto, .45 Automatic, or 11.43×23mm [1] is a rimless straight-walled handgun cartridge designed by John Moses Browning in 1904, for use in his prototype Colt semi-automatic pistol.
It is essentially a .45 ACP case, necked down to .357, resulting in a cartridge similar in form to the earlier 7.65×21mm Parabellum and 7.63×25mm Mauser cartridges. It was created to be a low recoil target cartridge that would function reliably with multiple bullet types, FMJ to cast lead wadcutters without the feeding problems that straight walled pistol rounds sometimes exhibit. [2]
It loaded cartridges made at the Evansville-Chrysler plant across town and then packed them in shipping crates for shipment. In November, 1943 it was the first plant to package ammo in vacuum-packed metal cans. In the Spring and Summer of 1944 it was employed in inspecting and repacking .45 ACP and .30 Carbine ammunition.
.45 ACP Italy: 1994 Beretta Px4 Storm: Beretta: 9×19mm Parabellum.40 S&W.45 ACP Italy: 2004 BFD 1911: BFD .45 ACP United States: 2010s Bren Ten: Dornaus & Dixon Enterprises, Inc. 10mm Auto.45 ACP.22 Long Rifle United States: 1983 Colt Double Eagle: Colt Manufacturing Company.45 ACP 10mm Auto.40 S&W 9×19mm Parabellum.38 Super United States ...
The .45 Auto Rim, also known as 11.5x23mmR, is a rimmed cartridge specifically designed to be fired in revolvers originally chambered for the .45 ACP cartridge. The Peters Cartridge Company developed the cartridge in 1920 for use in the M1917 revolver , large numbers of which had become available as surplus following the end of World War I. [ 3 ]
While the .45 ACP uses .451 inches in diameter for jacketed bullets, and .452 for lead bullets, the .45 Colt still uses .452 inch diameter jacketed bullets and .454 diameter lead bullets, often adding to the confusion between the two cartridges with similar names as the .45 ACP and Model 1911 pistols will often be called ".45 Colt" in common ...
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Unlike the 10 mm which operates at a SAAMI maximum of 37,500 psi, the .400 Corbon operates at 29,000 psi (although one source states that the pressure is 26,500 psi), [8] [9] much closer to the SAAMI maximum pressures for .45 ACP (21,000 psi), and .45 ACP +P (23,000 psi). [10] SAAMI Maximum Average Pressure for 400 Cor-Bon is 35,000 psi. [11]