My eyes are getting pretty bad, so I put the Williams peep on the back of my Optima, with the CVA front sight. I missed a nice buck at close range because of this setup, and my son did the same on opening day of muzzy season. At close range, the rear sight with the huge front sight completely blocked the front half of the buck. He was at about 30 yards. Easy shot. No buck fever. I looked up to verify where the deer was, since I could see him through the sight. Then I peeped again. The buck's tail was swishing and he was getting jittery. I felt pressure to get a shot off. What a fiasco. I'm making a change. Maybe a finer bead on the front will help....?