Bullet: 120 gr
Spitzer BTSP
(Speer)
Diameter: 0.257"
Powder: Reloder 23 (Alliant Powder)
Starting Powder: 60.8 gr
Max Powder: 64.1 gr
Primer: CCI 250 Mag
Case: Weatherby
Trim Length: 2.539"
Cartridge Overall Length: 3.170"
Starting Velocity: 3,031
Starting Pressure:
Max Velocity: 3,159
Max Pressure:
Source: https://reloadingdata.speer.com/Downloads/speer/ReloadingPdfs/257-weatherby-magnum-with-120-gr-spitzer-btsppdf.pdf
Printed from Shooter's Reference on 11/21/2024: