Load Data for .257 Roberts


 
Bullet: 85 gr BTV  (NOS)
Diameter: 0.257"
 
Powder: IMR 7828 SSC (Improved Military Rifle)
Starting Powder: 47.5 gr
Max Powder: 50.6 gr
 
Primer: FED 210m
 
Case: REM
Trim Length: 2.223"
 
Cartridge Overall Length: 2.750"
 
Starting Velocity: 3,029
Starting Pressure: 43,700
Max Velocity: 3,261
Max Pressure: 53,000
 
Compressed
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/