He just said.....a'bullet' for a muzzle loader did not mention a sabot and since I don't shoot that kind of crap I never thought to verify? I will find out though.
The minute amount of powder you get in the chamber will not swell a barrel. Don't worry about it!Watching the Maniac "shoot out a dryball" I only saw one possible problem. Many of us do the same thing and it works. However after the powder is trickled in I always make sure the ball is on the powder, it is possible the original cap firing may have moved the ball forward causing an obstruction in the barrel.