I have a knight bighorn 50 caliber that is a real good shooter. Serial number says it's one of the older ones made before the company sold out. I recently installed a western precision front sight & a williams rear peep. Shoots real well but to sight in horizontally, the peep must be adjusted well left of center. I can see only a little discrepency in the barrel crown. I guess my question is for those other shooters that have this gun (green mountain barrel), have you had similar experirnces? Could the sight holes possibly be drilled off center? bore runout? and the obvious crown questions. Anyway, interested in what you have to say. Thanks in advance.