For those who are wondering how you can get 70 grains of black powder in a a 45-70. You use one of these https://www.buffaloarms.com/45-cal-r...-body-van45rcp
I had no problem putting 70 grains in 45-70 cases. But its pretty tough without a compression die. I first used a drop tube , then an over powder wad then compressed it with one of these dies. It made the compression very uniform for every cartridge. I havent shot BPCR guns in a long time. But my Shiloh loaded this way was very accurate.