Load Data for .257 Roberts

+P
Bullet: 100 gr Spitzer BTSP  (Speer)
Diameter: 0.257"
 
Powder: 2700 (Accurate)
Starting Powder: 37.0 gr
Max Powder: 41.0 gr
 
Primer: CCI 250 Mag
 
Case: WIN
Trim Length: 2.223"
 
Cartridge Overall Length: 2.770"
 
Starting Velocity: 2,529
Starting Pressure:  
Max Velocity: 2,807
Max Pressure:  
 
 
Source: https://reloadingdata.speer.com/Downloads/speer/ReloadingPdfs/257-roberts-p-with-100-gr-hppdf.pdf
 
Printed from Shooter's Reference on 12/21/2024:
https://www.shootersreference.com/reloadingdata/257-roberts/