While not as traditionally correct as the RM, the Pedersoli Traditional Hawken with it's 1:48 twist in either .50 or .54 gives you a bit of flexibility in bullets. It will shoot round balls well and can stabilize some conicals like the Maxi-Ball, REAL and Great Plains. Plus it's alot cheaper. If you like a more period correct rifle, then I'd go with the RM in .54 with round balls. It'll do anything you'll need.
