The Pyro-P is so spongy that I wouldn't be surprised if you could fill the whole chamber and still ram a ball (no wad) down enough to clear the mouth. It makes a pretty stout load.
With over 15 perCUSSIN' revolvers, I've been called the Imelda Marcos of cap & ball.
SASS#3302 (Life), SASS Regulator, NRA (Life), DGB#129
Wolverton Mtn. Peacekeepers (WA), former Orygun Cowboy (Ranger, Posse from Hell)