Load Data for .257 Roberts


 
Bullet: 80 gr TTSX BT  (Barnes)
Diameter: 0.257"
 
Powder: IMR 8208 XBR (Improved Military Rifle)
Starting Powder: 36.0 gr
Max Powder: 39.8 gr
 
Primer: REM 9½
 
Case: REM
Trim Length: 2.223"
 
Cartridge Overall Length: 2.780"
 
Starting Velocity: 3,062
Starting Pressure: 38,400
Max Velocity: 3,284
Max Pressure: 44,700 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/