Red,
I take it that you meant to say that Triple 7 " pellets" are only to be used in inlines. Just about every sidelock shooter I know has at least tried, and most stuck with, Triple 7 powder. I have yet to have a hang fire in my .54 Renegade using #11 caps. I tried to explain why the Pyrodex pellets wouldn' t shoot properly in a sidelock before my buddy loaded them, but he thought the idiot at the store new more than the idiot standing beside him I guess. I was smart enough to watch from a distance.