+P
Bullet: 100 gr
Spitzer BTSP
(Speer)
Diameter: 0.257"
Powder: IMR 4831 (Improved Military Rifle)
Starting Powder: 44.0 gr
Max Powder: 48.0 gr
Primer: CCI 200
Case: WIN
Trim Length: 2.223"
Cartridge Overall Length: 2.770"
Starting Velocity: 2,805
Starting Pressure:
Max Velocity: 3,053
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: