Thanks for all the info guys, Looks like I'm gonna have some fun figuring out what will and will not work, (which is the most fun in shooting anyway).
I like the idea of sabots and my cast pistol bullets.
Looks like I have to come up with a shopping list to buy a bit of everything to see what's gonna work. TC supplies a reloading guide with its BP rifles, guess I'll start there and do some tweaking.
CPT USAR Ret
USAMU Sniper School Oct '78
Distinguished Rifle Badge 1071