Bullet: 270 gr
Spitzer BTSP
(Speer)
Diameter: 0.375"
Powder: H4350 (Hodgdon)
Starting Powder: 78.6 gr
Max Powder: 87.3 gr
Primer: CCI 250 Mag
Case: HDY
Trim Length: 2.570"
Cartridge Overall Length: 3.320"
Starting Velocity: 2,708
Starting Pressure:
Max Velocity: 2,966
Max Pressure:
Compressed
The 270-grain boat tail bullet is slightly longer than the 285-grainGrand Slam. If a charge fills the case, the BT doesn't leave much room and we did not apply as much compression with the BT as with the flat-base bullets. That's why you'll see some compressed charges for the boat tail are lighter than those for the heavier bullet.
Source: https://reloadingdata.speer.com/Downloads/speer/ReloadingPdfs/375-ruger-with-270-gr-spitzer-btsppdf.pdf
Printed from Shooter's Reference on 12/21/2024: