Load Data for .257 Roberts


 
Bullet: 75 gr HP  (Sierra)
Diameter: 
 
Powder: Reloder 15 (Alliant Powder)
Starting Powder: 37.6 gr
Max Powder: 41.8 gr
 
Primer: WIN WLR
 
Case: WIN
Trim Length:  
 
Cartridge Overall Length: 2.775"
 
Starting Velocity:  
Starting Pressure:  
Max Velocity: 3,340
Max Pressure:  
 
Barrel: 24" with None twist.
 
Source: https://www.alliantpowder.com/reloaders/recipedetail.aspx?gtypeid=2&weight=75&shellid=54&bulletid=107
 

Printed from Shooter's Reference on 12/21/2024:
https://www.shootersreference.com/reloadingdata/257-roberts/