Load Data for .257 Weatherby Magnum


 
Bullet: 87 gr SP  (Speer)
Diameter: 
 
Powder: Reloder 22 (Alliant Powder)
Starting Powder: 63.9 gr
Max Powder: 71.0 gr
 
Primer: CCI 250 Mag
 
Case: FED
Trim Length:  
 
Cartridge Overall Length: 3.150"
 
Starting Velocity:  
Starting Pressure:  
Max Velocity: 3,661
Max Pressure:  
 
Barrel: 24" with None twist.
 
Source: https://www.alliantpowder.com/reloaders/recipedetail.aspx?gtypeid=2&weight=87&shellid=57&bulletid=111
 

Printed from Shooter's Reference on 11/21/2024:
https://www.shootersreference.com/reloadingdata/257-weatherby-magnum/