Bullet: 100 gr
Spitzer SP Hot-Cor
(Speer)
Diameter: 0.257"
Powder: IMR 7977 (Improved Military Rifle)
Starting Powder: 66.5 gr
Max Powder: 73.9 gr
Primer: CCI 250 Mag
Case: Weatherby
Trim Length: 2.539"
Cartridge Overall Length: 3.150"
Starting Velocity: 3,055
Starting Pressure:
Max Velocity: 3,399
Max Pressure:
Source: https://reloadingdata.speer.com/Downloads/speer/ReloadingPdfs/257-weatherby-magnum-with-100gr-spitzer-sp-hot-corpdf.pdf
Printed from Shooter's Reference on 11/21/2024: