Bullet: 400 gr
SPFN
(Speer)
Diameter: 0.458"
Powder: IMR 8208 XBR (Improved Military Rifle)
Starting Powder: 76.0 gr
Max Powder: 80.2 gr
Primer: CCI 250 Mag
Case: FED
Trim Length: 2.490"
Cartridge Overall Length: 3.125"
Starting Velocity: 2,300
Starting Pressure:
Max Velocity: 2,410
Max Pressure:
Compressed
Source: https://reloadingdata.speer.com/Downloads/speer/ReloadingPdfs/458-winchester-magnum-with-400-gr-spfnpdf.pdf
Printed from Shooter's Reference on 12/21/2024: