I shot a two-day match where the first day went great and then on the second my scores started sinking. I chased and chased and couldn't seem to pull the silly rifle onto any predictable point of impact. I thought I was loosing my mind and then all of a sudden it occurred to me that front sight might be loose. Yep! By the time I tightened it down my scores and confidence were pretty shot but at least I figured it out!
Bob