.257 Weatherby Magnum
1944 · Roy Weatherby · 2 firearms in catalog
Also known as: .257 Wby Mag, .257 Weatherby
Cartridge specifications
| Bullet Diameter | 6.53 mm (0.257") |
| Neck Diameter | 7.21 mm (0.284") |
| Base Diameter | 13.03 mm (0.513") |
| Case Length | 64.77 mm (2.550") |
| Overall Length | 84.84 mm (3.340") |
| Max Pressure | 431 MPa (62,500 psi) |
| Typical Bullet Weight | 7.45 g (115 gr) |
| Typical Muzzle Velocity | 1036 m/s (3399 fps) |
| Typical Muzzle Energy | 4002 J (2952 ft·lbf) |
| Primer Type | Large Rifle Magnum |
| Cartridge Type | Belted |
| Introduced | 1944 |
Firearms chambered in .257 Weatherby Magnum
- Weatherby Mark V Carbonmark — Weatherby · Sniper Rifle · 2023
- Weatherby Vanguard — Weatherby, Inc. · Rifle · 1970