“45 ACP” and “45 Auto” are two different names for the same exact cartridge. “ACP” stands for “Automatic Colt Pistol,” so when you see “45 ACP” on one box of ammo and “45 Auto” on another, you can rest assured they’re one and the same.
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Are the 45 ACP and 45 Auto the Same?
Yes, 45 ACP and 45 Auto are the same cartridge. The acronym in “45 ACP” stands for “Automatic Colt Pistol.” Shooters use the terms “45 Auto” and “45 ACP” interchangeably when referring to this type of handgun ammunition.
What Does ACP Stand For?
“ACP” stands for “Automatic Colt Pistol.” The same holds true for both 45 ACP and 380 ACP ammunition.
45 ACP vs. 45 Auto: Are They the Same, or Different? originally appeared on Ammo.com