RE: Accuracy? how much, to what level?
It is rather nice to have a gun that is capable of shooting1" three shot groups at 100 yards. However, a gun that shoots 3"three shot groups at that distance is accurate enough for killing deer and hogs at normal muzzleloader distances.
The best hunter I know brings his Knight to the range once a year in the early fall and checks the zero. If the bullet or bullets hit in a 4" bullseye at 100 yards he goes home and cleans his gun: He kills a couple of elk, an antelope or two, several hogs and several deer with his gun every year. He is a superb hunter, not a shooter.