Load Data for .257 Roberts


 
Bullet: 120 gr HPBT  (Sierra)
Diameter: 0.257"
 
Powder: IMR 4350 (Improved Military Rifle)
Starting Powder:  
Max Powder: 41.5 gr
 
Primer: REM 9½
 
Case: REM
Trim Length: 2.223"
 
Cartridge Overall Length: 2.775"
 
Starting Velocity:  
Starting Pressure:  
Max Velocity: 2,780
Max Pressure: 45,000 CUP
 
Barrel: 24" with 1:10" twist.
 
Source: https://www.hodgdonreloading.com/
 

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