This particular rifle doesn't get taken to the range very often but, since it was out, I decided I wanted to try the peep sight and not the Buck Horn sight. I was shocked at how bad my grouping was when using the peep sight on day one. But wait.... There were reasons. Days two and three were spot on. This video goes into what I think is happening. There two likely reasons which I go into. Note: Quigley makes it look so easy. I'm using smokeless powder in this one of a kind 45-90 Sharps 1874.