I think I may have finally found a solution to my elevation adjustment issue with this combination. Seems a lot of people have had the same issue and after months of trying to dial in this muzzloader and making shims to get more elevation out of the rear sight and still being 6" low at 100 yards I came up with this today. Hoping to hit the range this weekend to try it out. I took the factory scope base that came with my rifle and filed down the rear section of picatinny rails, filed down the bottom edge of my williams rear peep sight to have a flat mounting surface and drilled and tapped the base to mount the rear peep. It gained me about 1/4" of elevation adjustment.