I own and shoot a Lyman .54 caliber Trade Rifle in flintlock. With the 1-48 twist, it seems able to shoot a lot of different projectiles. With roundball it shoots a .530 ball and 100 grains of powder. It also shoots powerbelts, and maxiball. The speed of the lock is very impressive and it is a great sparker. I did put in a RMC touch hole liner. I also use 3f goex as primer in it.