My NewEnglander suddenly lost accuracy a couple years ago. Oddly enough, it was at about the same time my eye doctor made me switch from contact lenses to bifocalglasses (blood vessels were trying to extend themselves into the lens area of my eyes to bring in more oxygen). I suddenly couldn't keep a 6" group where I used to shoot 2" groups!
I dug up a scope base for the barrel and stuck a 2-7X leupold on it, and miracously the groups suddenly shrank to 1".
Today I'm back to wearing contacts andthe rifle willshoot good groups again with the factory rear sight and a fiber optic front.
Odd how accuracy comes and goes with them muzzleloader barrels?????