Pull them bullets and dump the powder safely outside in a hole, water it in. With that rifle, pull that sight off, get some cowboy loads, and have fun on the range, deer hunting, hog hunting, etc. 45-70 don't need souped up, and lemme tell you the H&Rs shoot it good, but you gonna feel every extra ounce of omph a round has in it.
God Bless, and One Love.
GoodOlBoy