Load Data for .257 Roberts

+P
Bullet: 100 gr Spitzer SP Hot-Cor  (Speer)
Diameter: 0.257"
 
Powder: IMR 4320 (Improved Military Rifle)
Starting Powder: 35.0 gr
Max Powder: 39.0 gr
 
Primer: CCI 200
 
Case: WIN
Trim Length: 2.223"
 
Cartridge Overall Length: 2.770"
 
Starting Velocity: 2,505
Starting Pressure:  
Max Velocity: 2,768
Max Pressure:  
 
 
Source: https://reloadingdata.speer.com/Downloads/speer/ReloadingPdfs/257-roberts-p-with-100-gr-hppdf.pdf
 
Printed from Shooter's Reference on 12/21/2024:
https://www.shootersreference.com/reloadingdata/257-roberts/