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45 ACP Overview

The .45 ACP (Automatic Colt Pistol) cartridge was introduced by John Moses Browning in 1905 for the M1911 pistol. It emphasizes stopping power and manageable recoil, making it a favored choice for self-defense and law enforcement. The .45 ACP remains popular among shooters seeking reliable, hard-hitting handgun ammunition.

Why the .45 ACP Is a Top Choice

Proven stopping power with larger bullet diameter
Widely available with numerous load options
Compatible with many classic and modern pistols
Moderate recoil for experienced shooters
Strong aftermarket support for handloading

Key Variants

The .45 ACP features several popular load variants tailored for different uses:

45 ACP FMJ — Full metal jacket, ideal for target practice and training with reliable feeding.

45 ACP +P — Higher pressure load offering increased velocity for defensive situations.

45 ACP Hollow Point — Designed for self-defense with controlled expansion on impact.

45 ACP +P+ Armor Piercing — Specialized rounds for penetration, used mostly by law enforcement.

Competitor Comparison Table

Feature	45 ACP	9mm Luger	.40 S&W
MSRP (per 50 rounds)	$20–$30	$15–$25	$22–$35
Capacity/Size	Large caliber, fewer rounds in standard mags	Smaller caliber, higher magazine capacity	Medium caliber, moderate capacity
Weight (bullet)	185–230 grains	115–147 grains	155–180 grains
Optics Ready	Dependent on pistol model	Widely available on modern pistols	Available on some models
Trigger Type	Semi-automatic pistol standard	Semi-automatic pistol standard	Semi-automatic pistol standard
Notable Pro	Exceptional stopping power	Higher capacity and faster velocity	Balance of power and capacity
Notable Con	Lower magazine capacity	Lower stopping power	More recoil than 9mm

Best Use Cases

Self-defense and concealed carry
Law enforcement duty use
Range practice and training
Competitive shooting
Collector interest for historic pistols

FAQs

Can I use .45 ACP in a 1911-style pistol?

Yes, the .45 ACP was originally designed for the M1911 pistol and is fully compatible with modern 1911-style handguns.

What is the typical bullet weight for .45 ACP ammo?

Standard bullet weights range from 185 to 230 grains, with 230 grains being the most common load.

How does .45 ACP compare to 9mm in stopping power?

.45 ACP offers larger bullet diameter and typically greater stopping power but fewer rounds per magazine than 9mm.

45 ACP for Sale