I love hunting with a ML. It is a little slower, more peaceful, more intimate type of hunting.
Muzzle loaders can be quite accurate-at their intended ranges. Some 'hints'. Do not try to 'stretch' the range on the ML as the more arched trajectory and quick loss of bullet energy take their toll quickly. Treat it more like bow hunting than hunting with a modern, high powered, high velocity, flat shooting rifle and you will do well.
The classis 'bam-flop' is often possible with a ML but do not expect it. (You will get it if you hit a solid supporting body structure but unlikely otherwise.) Also, you do not have the high velocity and rapid expansion to kill a deer quickly. You are more likely (than with modern gun) have a blood trail to follow. A ML projectile also kills more like an arrow than a high velocity bullet-that is, they punch a hole and let the animal quickly bleed out. Get close and make sure you get a double hole-one in, one out and you will do fine. The bigger the hole the better. I use a .54 cal-why?-cause I couldn't find a .64 caliber!
I'll probably get 'flame' from this post as many will swear they can kill a deer every shot dead on the spot from 200 yds with a ML and the modern saboted slugs, but hunting experience will soon tell you otherwise.
Good luck and, believe me , it IS a LOT of fun!