I have a 50 cal Hatfield, patent breech. It’s my understand Pedersoli bought Hatfield and use the same patent breech design. At my first shoot with it, the patent breech completely fouled. Once cleaned with water and various picks, I met a shooter that never swabbed between shots. He did however, seat the patched round ball in subsequent loads with a slightly moistened patch. He claimed this method removed some fouling and left his barrel in the same condition for each shot. So, your initial load patch will probably be a favored lube, in the event you don’t shoot the first day out. However, once in the hunt and shooting, powder, patch, lube and ball, seat with a moistened patch. Since you’ve started shooting, you’ll be doing a thorough cleaning at days end. Since using this method with my Hatfield, with its patent breech, has not plugged with fouling. Swabbing between shots on empty barrel will push fouling into the reduced size portion of your patent breech. Pouring powder into the patent breech will bring minimum fouling with it.