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.270 Weath. Mag.
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Caliber Specifications:
Caliber: | .270 Weath. Mag. |
Standard / Datasheet: | C.I.P. |
Bullet Diameter: | 0.277" | 7.04mm |
Primer Size: | Large Rifle Magnum (LRM) |
Max. Case Length: | 2.549" | 64.74mm |
Max. Cartridge Length / OAL: | 3.295" | 83.69mm |
Max. Standardized Pressure: | 63817 psi | 4400 bar |
Case Capacity: | 82.0 Grains of Water | 5.32 cm3 |
CID: | CID_270 |
Last updated: | 2/20/2025 |
- The .270 Weatherby Magnum (Wby Mag) is a long-length magnum cartridge developed by the Weatherby firearms company in 1943. It is based on an elongated .300 H&H Magnum case and uses a .277 caliber bullet, making it an ideal choice for those seeking tremendous performance with minimal recoil.
The .270 Wby Mag's efficient ballistics allow it to maintain flat trajectories and impressive retained energy levels at further ranges. This makes it great for hunters looking to take down large game such as elk or bear with extreme accuracy at extended distances. Its low recoil also makes it suitable for novice shooters learning how to shoot, while its high velocity ensures unmatched knockdown power when needed. 
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Most popular powders from our community members for caliber .270 Weath. Mag.:
Weight vs. Velocity - Suitable Bullets for this Caliber
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Barrel Length Variation vs. Velocity - by Bullet Weight
.270 Weath. Mag. load data available with the following bullets:
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