We picked the 70 grains to start with. since we were looking through different manuals and couldnt find the exact bullet with what powder we have. So we winged it off a similar bullet. We used CCI magnum primers in those. I would like to find a good load since I got 95 more of them bullets. I'm ok with experimenting we got some more powders recently IMR 4831, h4831sc and reloader19.