In reply to: The old standards of 68 to 70gr. of IMR4064 ( or equivalent) is an elk, moose or other game buster and needs no speeding up. This is with 270gr.
I use the Speer 270 gr BTSP over 70 gr. of 4064 in mine and I am pleased with it so far. It is a load that I tried out this year. So far I have taken 1 deer and an antelope with it. A week from monday I hope to try it on elk.