I went through this exercise with my kids when they first started.
I started with 35 grains of Blackhorn by weight and a 200 grain Traditions Smackdown XR. Chrono was around 1250 fps. Recoil was absolutely nothing. Once they shot that a little I snuck up to 40 grains by weight. We killed several deer cleanly with this setup inside of 80 yards. A small "pop", blood trails weren't huge, but the deer die quickly and easily. I incrementally went up to 45 grains of BH, and later 50 grains.
Accuracy at all charge levels was the same. Hole in hole accurate. Put a gun in a tripod with a soft load and go hunt.