Tyrone, thanks for the Excel spreadsheet and the powder heat values above. In doing some crunching, I've
Powder Powder Gr Barrel Life Bullet WT Velocity
H870 72.5 55K 821 130 3200
H4831SC 68.5 55K 850 95 3550
Magnum 65.8 55K 1044 130 3100
IMR4350 58.2 55K 1133 130 3100
IMR7828 62.2 55K 1059 130 3100
IMR7828 70.4 55K 826 95 3550
H4350 62.5 55K 826 95 3550
RL22 58.1 55K 1015 140 3000
Magnum 64.9 55K 1073 140 3000
