Frontier...One of my hunting buddies happens to have that gun in percussion...Bought it to me in bad shape...I worked up a load...80 grains FFF Goex, .530 ball and .015 Ox-Yoke patch, lubed with SnoSeal...His gun didn't like anything over 80 grains...I shoot a .54 and roll my own balls, if you need 15 or so let me know and I'll send you that many with .010, 015 and .018 patches, that way you can see which it likes...