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The Beretta M9, formally Pistol, Semiautomatic, 9mm, M9, is a 99mm Parabellum pistol of the United States military adopted in 1985. It is 8.5 inches in length. (via Wikipedia)
303 british cartridge
Colt 45 m1911 migit version
233 remington cartridge
45 colt cartridge
about an inch too big... but pretty much the right size