Cartridge comparison
.257 Ackley Improved vs 6.5x55mm TRI
.257 Ackley Improved and 6.5x55mm TRI are both in the reference; see the full spec comparison below.
Side by side
| .257 Ackley Improved | 6.5x55mm TRI | |
|---|---|---|
| Type | Rifle | Rifle |
| Introduced | 1945 | 2015 |
| Bullet diameter | 0.257″ | 0.2638″ |
| Case length | 2.3331″ | 2.1535″ |
| Max pressure | 54,000 psi | 55,114 psi |
| Recoil | 9–13 ft·lb | 10.9–12.5 ft·lb |
| Effective range | 400 yd | 400 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.
