Cartridge comparison
.45 ACP vs .45 Auto Rim
.45 ACP and .45 Auto Rim are both in the reference; see the full spec comparison below.
Side by side
| .45 ACP | .45 Auto Rim | |
|---|---|---|
| Type | Pistol | Revolver |
| Introduced | 1905 | 1920 |
| Bullet diameter | 0.452″ | 0.452″ |
| Case length | 0.898″ | 0.8992″ |
| Max pressure | 21,000 psi | 17,400 psi |
| Recoil | 9–14 ft·lb | 3–5 ft·lb |
| Effective range | 50 yd | 50 yd |
Highlighted cells hold the clear edge where both sides have a number. Every figure is a range maximum from the reference; typical loads run lower.
Case profiles, to scale
Drawn to the same scale, so the proportions are true. Physical size varies with your screen.