Originally Posted by
Geezer in NH
You look through the rear sight paying no attention to it. Focus on the front sight. The aperture, of the front, whether metal or plastic has the hole to focus on. Make the hole the same all around the bull none touching and hopefully the same light around and squeeze the shot off.
I like a hole in clear plexi-glass the size needed for the bull and distance. I had many of the inserts in different hole sizes and use them. Won many matches that way after using them and never shot the metal ones well as to much distraction in the sight picture.