I use an Irish head for the powder bag, actually a shot bag filled with powder, then a thin felt wad a thick fiber wad then the shot and either a real thin overshot wad or a wad of crumbled up newspaper. I hunt without a dog in heavy brush so I made these home made speed loaders that are only about an inch tall that fit neatly into my pocket. The home spun speed loaders hold my pre-measured shot charge and all of my wads. The powder bag hangs from my belt. So I'm lean and trim as much as I can be that is and sorta outfitted like I am carrying a breachloader.
All the best