no mama i havent as yet , in my match grade fayetteville the barrel costed me 325.00 and i was worried that i'd have problems with rust, but with my system i haven't yet, as far as accuracy the only rifle to give me a ration of doodoo was a t/c hawkin, that i still have . the same one my dad and i built that has had thousands of rounds shot through it, about the middle of last year, the accuracy was at 1/2 inch at 75 yards off hand when a, i reloaded and shot another group the group suddenly opend up to almost 10" i went nuts tring to figuar it out , when i looked at the muzzle and relized that after years of sevice the muzzle showed obvious
oval shape, sent it to a good friend who recut the crown and for giggles i tried a exparament and had him do what t/c does to thier new production guns and reamed 1 1/4" of barrel, i now shoot those funky powerbelts out of it and proud to say accuracy also seems to have really improved , that is the only gun to shot modern copper jackets out of a muzzleloader.
kevin