Load Data for .257 Roberts


+P
Bullet: 117 gr SPBT  (Sierra)
Diameter: 0.257"
 
Powder: IMR 7828 SSC (Improved Military Rifle)
Starting Powder:  
Max Powder: 46.8 gr
 
Primer: FED 210m
 
Case: REM
Trim Length: 2.223"
 
Cartridge Overall Length: 2.775"
 
Starting Velocity:  
Starting Pressure:  
Max Velocity: 2,941
Max Pressure: 57,000
 
Barrel: 24" with 1:10" twist.
 
Source: https://www.hodgdonreloading.com/
 

Printed from Shooter's Reference on 07/21/2025:
https://www.shootersreference.com/reloadingdata/257-roberts/