I have tried red dot sight, reflex red dot, original sight, painted sights, and ghost ring sight. My groups are about the same size with all of them. Right now I am using the ghost ring with a large hole and a large round front sight. Maybe the worst of the lot for precision but I can see it pretty good. If I am trying to shoot a small group what I really need is a target that has enough contrast to see the bull but still allows me to see the front sight. I think maybe with the red dot sight I tend to pay less attention to trigger control and yank it when it wobbles onto the target.