If you shoot a 50 caliber round ball through both lungs of any deer you will encounter in PA at less than 75 yards (ethical range with a flinter and open sights)
it will die and bleed a lot.

If you are not an experienced bow hunter, you may have missed the spoor.

I don't know anyone I have hunted MZ in PA with to have ever lost a deer. (We still all use roundballs)

It is primitive hunting........ not trying to make a BP gun a 30-06.