Bullet: 165 gr
Grand Slam SP
(Speer)
Diameter: 0.308"
Powder: Reloder 15 (Alliant Powder)
Starting Powder: 56.0 gr
Max Powder: 60.0 gr
Primer: CCI 250 Mag
Case: WIN
Trim Length:
Cartridge Overall Length: 3.290"
Starting Velocity: 2,655
Starting Pressure:
Max Velocity: 2,809
Max Pressure:
Source: https://reloadingdata.speer.com/downloads/speer/reloading-pdfs/rifle/300_Winchester_Magnum_165.pdf
Printed from Shooter's Reference on 11/21/2024: