I went to shoot my Lyman Deerstalker christmas eve. Fired 3 shots at 50 yards, cleaning between them. Got to the target, no holes. Shooting Pa Conicals with felt wad behind. After some investigation, and a 4'x8' backstop, found out I was 2 feet right and a foot low. Only change I made was from 3F to 2F, I expected some change, but not 2 feet right. I had to drift the rear sight so far left and the front so far right they look weird. The barrel was slightly "loose" with the pin so I tightened it up using Lyman's instructions. Slightly better, but still way off. Any ideas????