.45 ACP

.45 ACP
.45 ACP cartridge full metal jacket
Type	Pistol
Place of origin	United States
Service history
Wars	World War I – present
Production history
Designer	John Browning
Designed	1904
Produced	1905–present
Variants	.45 ACP +P, .45 Auto Rim, .45 Super, .460 Rowland
Specifications
Case type	Rimless, straight
Bullet diameter	.452 in (11.5 mm)
Neck diameter	.473 in (12.0 mm)
Base diameter	.476 in (12.1 mm)
Rim diameter	.480 in (12.2 mm)
Rim thickness	.049 in (1.2 mm)
Case length	.898 in (22.8 mm)
Overall length	1.275 in (32.4 mm)
Case capacity	26.7 gr H2O (1.73 cm3)
Rifling twist	1 in 16 in (406 mm)
Primer type	Large (some makers are now using Small) Pistol
Maximum pressure (CUP)	19,900 psi (137 MPa)
Maximum pressure (SAAMI)	21,000 psi (140 MPa)
Ballistic performance
Template:Infobox firearm cartridge/ballisticsTemplate:Infobox firearm cartridge/ballisticsTemplate:Infobox firearm cartridge/ballisticsTemplate:Infobox firearm cartridge/ballisticsTemplate:Infobox firearm cartridge/ballisticsTemplate:Infobox firearm cartridge/ballistics footer Bullet mass/type Velocity Energy The .45 ACP (Automatic Colt Pistol) or 45 Auto (11.43×23mm) is a type of bullet, made to be used in the M1911 pistol used by the U.S. Military. It was first made by John Browning in 1904, the "ACP" in the name stands for "Automatic Colt Pistol". It was the standard for handguns in the U.S. military until they switched to the Beretta M9 (Beretta 92) in 1985 that used a smaller caliber 9mm bullet. The .45 is famous for being the bullet used in the M1911 and for being the choice of the U.S. Military for their pistols for almost 75 years. The .45 ACP has good stopping power because of the large size of the bullet, a .45 ACP bullet is almost half an inch. When shot at human targets, the .45 ACP bullet makes a big hole that causes blood loss and leads to faster death. It was used for guns like the M1911, the Thompson submachine gun, the M3 Grease Gun, the USP45, the UMP45, the TDI Kriss Super V, the MAC-10, and many other guns. .45 ACP Media Cross-sectional diagram of U.S. Army .45 ACP "ball cartridge" for the Model 1911 pistol, with dimensions in inches 11.43x23 mm Automatic Colt Pistol Mod. 1911 (Peters Cartridge Co, USA) .45 ACP cross section (3D model), made in solidworks 2019 .45 ACP cartridge dimensions SAAMI specifications for .45 ACP. All dimensions are in inches (millimeters): .45 ACP pistol cartridge, FMJ bullet References