Load Data for .257 Roberts


 
Bullet: 80 gr Tipped TSX  (Barnes)
Diameter: 0.257"
 
Powder: Hunter (Ramshot)
Starting Powder: 46.0 gr
Max Powder: 50.0 gr
 
Primer: FED 210
 
Case: Winchester Western
Trim Length: 2.223"
 
Cartridge Overall Length: 2.830"
 
Starting Velocity: 3,148
Starting Pressure:  
Max Velocity: 3,447
Max Pressure:  
 
*Load data for this cartridge was tested at the standard SAAMI pressure level—not the higher +P pressure levels listed in some manuals.
Barrel: 24" with 1:10" twist.
 
Source: https://www.barnesbullets.com/wp-content/uploads/2021/05/257Roberts.pdf
 

Printed from Shooter's Reference on 12/21/2024:
https://www.shootersreference.com/reloadingdata/257-roberts/