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.257 Weath. Mag.
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Caliber Specifications:
Caliber: | .257 Weath. Mag. |
Standard / Datasheet: | C.I.P. |
Bullet Diameter: | 0.257" | 6.53mm |
Primer Size: | Large Rifle Magnum (LRM) |
Max. Case Length: | 2.549" | 64.74mm |
Max. Cartridge Length / OAL: | 3.170" | 80.52mm |
Max. Standardized Pressure: | 63817 psi | 4400 bar |
Case Capacity: | 84.0 Grains of Water | 5.45 cm3 |
CID: | CID_247 |
Last updated: | 2/20/2025 |
- The .257 Weatherby Magnum is a high velocity cartridge developed by Roy Weatherby in the 1950s. It is based on a stretched .300 H&H case and uses a .257 caliber bullet, giving it outstanding performance for long-range shooting or hunting big game animals such as elk and bighorn sheep.
The .257 Weatherby Magnum is known for its excellent accuracy and flat trajectory, making it an ideal choice for serious target shooters or hunters looking to take down large animals at long distances. Its high velocity also gives it impressive energy levels and great penetration, ensuring reliable performance no matter what type of game you're hunting. Weight vs. Velocity - Suitable Bullets for this Caliber
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Barrel Length Variation vs. Velocity - by Bullet Weight
.257 Weath. Mag. load data available with the following bullets:
(most popular first)
Filter by Bullet Weight (Grains)
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