My favorite load for the 45-70 is 40 grains of IMR 4198 under an RCBS mould 440 grain gc cast, this gets 1823 fps over the chronograph.:Fire:
45 caliber hole in, way bigger upon exit.
Never recovered one yet........
This load was safe in my rifle, (CVA Scout) always work up to any and all loads.:2gunsfiring_v1: