Bullet: 400 gr
SPFN
(Speer)
Diameter: 0.458"
Powder: 1200-R (Alliant Powder)
Starting Powder: 70.5 gr
Max Powder: 74.1 gr
Primer: CCI 250 Mag
Case: FED
Trim Length: 2.490"
Cartridge Overall Length: 3.125"
Starting Velocity: 2,270
Starting Pressure:
Max Velocity: 2,381
Max Pressure:
Source: https://reloadingdata.speer.com/Downloads/speer/ReloadingPdfs/458-winchester-magnum-with-400-gr-spfnpdf.pdf
Printed from Shooter's Reference on 11/21/2024: