+P
Bullet: 87 gr
TNT HP
(Speer)
Diameter: 0.257"
Powder: Reloder 16 (Alliant Powder)
Starting Powder: 44.6 gr
Max Powder: 49.5 gr
Primer: FED 210
Case: FED
Trim Length: 2.223"
Cartridge Overall Length: 2.780"
Starting Velocity: 3,044
Starting Pressure:
Max Velocity: 3,379
Max Pressure:
Compressed
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 05/02/2024: