Bullet: 90 gr
(Barnes)
Diameter: 0.257"
Powder: IMR 4831 (Improved Military Rifle)
Starting Powder: 64.0 gr
Max Powder: 68.0 gr
Primer: FED 215m
Case: Weatherby
Trim Length: 2.539"
Cartridge Overall Length: 3.120"
Starting Velocity: 3,465
Starting Pressure:
Max Velocity: 3,683
Max Pressure:
Barrel: 24" with 1:10" twist.
Source: https://www.barnesbullets.com/wp-content/uploads/2021/05/257WeatherbyMagnum.pdf
Printed from Shooter's Reference on 05/03/2024: