During the late 19th century and early 20th centuries, the U.S. Cavalry began trials to replace their sidearm arsenal of issued Single Action Army (SAA) … See more

The .45 ACP is an effective combat pistol cartridge. It combines accuracy as well as stopping power for use against human targets, has relatively low muzzle blast and flash, and it produces moderate recoil in handguns (made worse in compact models). The .45 … See more

Several US tactical police units still use the .45 pistol round. While high capacity firearms are available in .45 ACP, the greater length and diameter of the .45 ACP means that the grip of the pistol must be longer and wider than the grip of a comparable pistol … See more

• 45 (colloquial in English, Spanish, and Tagalog)
• .45 ACP (Automatic Colt Pistol)
• .45 Rimless Smokeless
• .45 Auto
• 45 Auto. Colt / 45 AC (Winchester Repeating Arms … See more

The .45 ACP has 25–27.4 grains (1.62–1.78 g) of H2O cartridge case capacity, depending on manufacturer and production lot.
45 Auto maximum CIP cartridge dimensions. All sizes are in millimeters (mm). See more

Magazine capacity varies depending on the type of firearm. Standard (not extended) single-stack magazines for pistols based on the 1911 design commonly, hold eight … See more

Rounds are available from 68-to-300-grain (4.4 to 19.4 g) with a common load being the standard military loading of a 230-grain (15 g) FMJ bullet (for comparison, the most common See more