Re: New muzzleloader
A 50 caliber is considered by most to be good for deer to 100 yards. A 54, over the same powder may give you an extra 10 yards. It isn't a big edge. If you could find a 58, that would be much better at killing and bucking wind, but it loses much of it's edge with the steeper trajectory. The 50 is flatter shooting.
So if you are terrible at estimating ranges, the 50 may be the ticket, less need for "kentucky elevation"
But keep in mind that the average deer shot in PA is shot at something like 35 yds. If you are hunting the scrubby swamps and hollows or won't have 100 yd shots, it really doesn't matter much what caliber you chose.
i would personally still go with the 54, but it is easier to find commercial feed for a 50.