Is there a formula that can be used to determine the movment of iron sights when sighting in a gun? For example, I have a Henry Gold Boy .22 rifle with iron sights. The front sight is 'fixed' but can be moved sideways with a brass drift punch or a hard wood dowel and mallet. The POI (point of impact) is 1 inch to the left of POA (point of aim) at 35 feet. The distance between the rear and front sight is 17 1/4 inches. I was wondering if there was a formula that would tell you how many 100ths or 1000ths of an inch the front sight has to move to the side to accurately sight in the rifle? I guess I could tap the sight (and I probably will) until I get it where I want it. I was just curious if there was a formula some people use.