That is actually where I started. Nothing from 70 to 100 grains of pyrodex shot better than 4 or 5 inches at 50 yards. I am actually happy with the results I got with black mz. It ignites easily, works well with my rifle, and unlike real black powder I can actually buy it locally (for $10 a pound to boot). I may order a pound of goex when I put in my next hazmat order, but if this load packs enough wallop I have no reason to do anything else. It also does well with PRB from 50 to 70 grains (haven't gone higher).