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45 ACP has remained in continuous service. would conform to the NATO Standardization Agreement, the.
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military issue cartridge from 1911 through 1985, when the Beretta M9 (Pistol, Semiautomatic, 9mm, M9) replaced it so that the U.S. However, the velocity specification for “Ball” loads changed over the years and was last listed at 830 fps.īullets should be seated to their listed overall lengths, or pressures can change. Period mil-spec loads from Winchester Repeating Arms, Frankford Arsenal and Union Metallic Cartridge contained a 230-grain Ball bullet with a velocity of 850 fps. It was officially adopted for service March 29, 1911. This ultimately lead to Browning designing the Colt Model 1911 pistol, which passed rigid military testing without a single failure. The military tested the new pistol and cartridge at length but wanted additional safeties and a heavier bullet. 45 ACP was born and was housed in the newly designed Colt Model 1905 Automatic Pistol.
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45-caliber, 200-grain bullets at 900 feet per second (fps), the. 30-03 rimless case (a cartridge that later evolved into the. At the military’s request, Browning immediately went to work on a new. 40 caliber due to the barrel groove and bore diameters used for their production revolvers chambered in the. In 1904, Browning and Colt were experimenting with a “.41 caliber pistol and cartridge,” which was probably a. Thompson was clearly the driving force in the development and ballistic requirements for a “man-stopper” pistol and cartridge. 45-caliber handgun, so the army and cavalry specified that their new pistol would be. The Thompson-LaGarde tests conducted during 1904 further proved the advantages associated with a. 45 Colt revolvers being reissued, confirming the effectiveness of thatĬartridge. This resulted in Colt Single Action Army. 38 Long Colt cartridge, which performed poorly against the Moro juramentado warriors during the Moro Rebellion of the Philippine-American War (1899-1902). 45 Colt quickly earned an outstanding reputation as a fight-stopping cartridge on the frontier, even when stoked with reduced-power military loads. military in 1873, along with the Colt Single Action Army revolver. 45 Colt during the early 1870s, which was adopted by the U.S. military and produced similar performance to military. 45 ACP (right) was developed at the request of the U.S.