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45 ACP ammo is for sale every day at You can buy 45 ACP ammo made by Winchester, Fiocchi, Remington, and more through one of the many sellers listing their products here at, the world’s largest gun auction site.

History of 45 ACP Ammo

45 ACP ammo, or Automatic Colt Pistol ammo, was designed in 1904 by John Browning for use in his prototype semi-automatic pistol when the US Calvary asked for .45 caliber equivalent Colt modified pistol designed to fire an enlarged prototype .41 round. The original round began filled with a 200 grain bullet and fired at 275 meters per second. After revisions had been made by Winchester, Frankford Arsenal, and Union Metallic Cartridge, it ended up using a 230 grain bullet and fired at about 260 meters per second.

In 1910, the second round of military pistol testing began, the result was the adoption of the Model 1911 as a the military standard and with it, came 45 ACP ammo.


45 ACP ammo provides an effective combat pistol cartridge that is a combination of both power, and accuracy. It has significant stopping power against human targets and features a low muzzle blast/flash and a moderate to light recoil.


45 ACP ammo’s combination of stopping power and controlled penetration make it a practical police choice, however pistols chambered for 45 ACP ammo tend to have smaller magazines and weigh more than the available counterparts. The greater length and diameter of 45 ACP pistols also pose an issue to small-handed shooters. However, many of these pistols such as the HS200 and FN FNP-45 are equipped with double stacked magazines carrying up to 14 rounds. Beyond military and law enforcement, 45 ACP ammo is also used by sport shooters. Many US tactical law enforcement units still use 45 ACP ammo including the FBI’s Hostage Recuse Team. sellers update their auction listings frequently, so if you’re looking to buy 45 ACP ammo, check back often.


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