Muskets like powder....
The best person to ask about loads is bill Curtis
Put a good measure of bp down there ( they suggest 120 gns ) but I wouldn't
Try a good stout measure in
Place a snug thick wad in the barrel followed by a dollop of lube then a loosely fitting ball then another dollop of lube......then place another snug fit thick wad on top and seat all 3 together on top of the powder