Load Data for .458 Winchester Magnum


 
Bullet: 350 gr SP  (Speer)
Diameter: 0.458"
 
Powder: IMR 3031 (Improved Military Rifle)
Starting Powder: 71.0 gr
Max Powder: 74.0 gr
 
Primer: CCI 250 Mag
 
Case: WIN
Trim Length: 2.490"
 
Cartridge Overall Length: 3.105"
 
Starting Velocity: 2,279
Starting Pressure: 31,000
Max Velocity: 2,354
Max Pressure: 32,900 CUP
 
Compressed
Barrel: 24" with 1:14" twist.
 
Source: https://www.hodgdonreloading.com/
 

Printed from Shooter's Reference on 12/03/2024:
https://www.shootersreference.com/reloadingdata/458-winchester-magnum/