56.5 gr. IMR 4831 and the Speer 130 gr. Hot core. Shoots cloverleafs out of my old M70. Kills well and holds together. I used 54.5gr. of the same powder with the Speer 150 gr. BTSP a few years back, but the bullet disintegrated on a 15 yds. shot. 4 exit wounds. I used the Win 130 gr. Silvertip over 60 gr. H4831, but there was no expansion on a 110 yd shot.