Many years ago I picked up a Lyman Great Plains 50 cal from a pawn shop. It was my introduction to black powder. Thought those conical lead would work great. For some reason the bullets wouldn't make it to the target. Bought a book on muzzle loaders and realized the twist was too slow. Also found you could run lighter round balls faster. After getting round balls dialed in the rifle shot great and they fouled the barrel much less. Took a few deer with it.
I have a 54 cal hunter now. The shop in Springfield and guys at ARPC helped me get balls, patches and lube to set up the right combo a few years ago. Problem is I have not shot it for awhile and forgot what thickness patches worked best. Better get to the range before my elk hunt opens later this month. This time I will write down the patch and ball size with the powder charge for future reference.