Load Data for .458 Winchester Magnum


 
Bullet: 400 gr FNSP  (Speer)
Diameter: 
 
Powder: Reloder 7 (Alliant Powder)
Starting Powder: 66.6 gr
Max Powder: 74.0 gr
 
Primer: CCI 250 Mag
 
Case: WIN
Trim Length:  
 
Cartridge Overall Length: 3.125"
 
Starting Velocity:  
Starting Pressure:  
Max Velocity: 2,316
Max Pressure:  
 
Barrel: 24" with None twist.
 
Source: https://www.alliantpowder.com/reloaders/recipedetail.aspx?gtypeid=2&weight=400&shellid=112&bulletid=166
 

Printed from Shooter's Reference on 12/21/2024:
https://www.shootersreference.com/reloadingdata/458-winchester-magnum/