Ugh, do as you like, but from what I understand, there could still be embers down in the breech after the shot and swabbing, and that flask will become a bomb if'n that powder ignites. It's a rare occurrence, but it has happened. Just sayin'. You probably already know this, like I says, just sayin'
Well I won't get the vaccine either. Have been loading muzzleloaders since 1971 this way with never a snivel. If I blow my hand off I will definitely post the gory details.