Cartridge comparison
.280 Ackley Improved vs 7x65R Brenneke
.280 Ackley Improved and 7x65R Brenneke are both in the reference; see the full spec comparison below.
Side by side
| .280 Ackley Improved | 7x65R Brenneke | |
|---|---|---|
| Type | Rifle | Rifle |
| Introduced | 1960 | 1917 |
| Bullet diameter | 0.284″ | 0.2854″ |
| Case length | 2.5252″ | 2.5591″ |
| Max pressure | 65,000 psi | 55,114 psi |
| Recoil | 18–25.5 ft·lb | 16–20.1 ft·lb |
| Effective range | 600 yd | 300 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.
