Load Data for .257 Roberts


 
Bullet: 115 gr PART  (NOS)
Diameter: 0.257"
 
Powder: IMR 4350 (Improved Military Rifle)
Starting Powder: 41.9 gr
Max Powder: 45.5 gr
 
Primer: REM 9½
 
Case: REM
Trim Length: 2.223"
 
Cartridge Overall Length: 2.890"
 
Starting Velocity: 2,666
Starting Pressure: 39,800
Max Velocity: 2,866
Max Pressure: 46,600 CUP
 
Barrel: 24" with 1:10" twist.
 
Source: https://www.hodgdonreloading.com/
 

Printed from Shooter's Reference on 05/03/2024:
https://www.shootersreference.com/reloadingdata/257-roberts/