Developed by John Browning for use in his Colt semiautomatic .45 pistol, the .45 ACP (Automatic Colt Pistol) cartridge is considered by many shooters to be the most effective pistol cartridges on the market. Also known as the .45 Auto cartridge, the .45 ACP pistol cartridge combines optimum accuracy, incredible stopping power and controlled penetration with moderate recoil and low muzzle blast and flash. Today the .45 ACP cartridge is used by many sport shooters, law enforcement officials and hunters. Whether you are looking for Corbon .45 ACP ammunition, .45 ACP Wolf ammunition, Winchester .45 ammunition or .45 ACP Extreme Shock ammunition, you'll find it here.