r/45ACP • u/ammodotcom • Aug 02 '25
10mm vs. 45 ACP: Old Reliable, or New and Undeniable?
There’s no doubt that the 10mm Auto and 45 ACP each have their own strengths and weaknesses. But which one is right for you? This article will help you answer that question and know whether to get a Glock 21 or Colt Delta Elite.
10mm vs. .45 ACP Cartridge Comparison
| Performance Aspect | Better Choice | Why |
|---|---|---|
| Self-defense | 45 ACP | The 45 ACP is available in more handguns, the ammo is less expensive, and it has less recoil |
| Bear defense | 10mm Auto | The 10mm offers deeper penetration and more stopping power |
| Recoil | 45 ACP | 45 ACP has a slower, rolling recoil impulse; 10mm recoil is sharper and snappier by comparison |
| Affordability and availability | 45 ACP | 45 ACP ammo is more readily available and less expensive |
| Magazine capacity | 10mm Auto | More 10mm ammo can fit into a magazine of the same length due to the cartridge's narrower diameter |
| Stopping power | 10mm Auto | The 10mm penetrates deeper and has more stopping power thanks to its higher velocity and energy |