Load Data for .257 Roberts

+P
Bullet: 87 gr TNT HP  (Speer)
Diameter: 0.257"
 
Powder: 748 (Winchester)
Starting Powder: 39.0 gr
Max Powder: 43.0 gr
 
Primer: CCI 250 Mag
 
Case: WIN
Trim Length: 2.223"
 
Cartridge Overall Length: 2.780"
 
Starting Velocity: 2,735
Starting Pressure:  
Max Velocity: 3,056
Max Pressure:  
 
 
Source: https://reloadingdata.speer.com/Downloads/speer/ReloadingPdfs/257-roberts-p-with-87-gr-spitzer-sp-hot-corpdf.pdf
 
Printed from Shooter's Reference on 11/21/2024:
https://www.shootersreference.com/reloadingdata/257-roberts/