Have you deep cleaned and/or polished and deep cleaned your barrel? Sometimes a gun just really likes a very smooth, squeaky clean bore to pattern right. The process for both are pinned to the top of one of the boards on the site. I always pattern a gun clean, then dirty, then polished and deep cleaned and with the exception of ONE gun, every single gun I've worked on (more than 30) have shot better once cleaned, polished and then deep cleaned after polishing. Also, are you using a backer paper large enough to see what your patterns actually look like? I buy the rolls of paper from Walmart and cut them square and do not shoot at it twice. Once I have the pattern centered to my poa with whatever load/choke combo, I place a small, bright post-it in the center of a 10" circle as my aim point sonic can be removed after shooting. A big roll of white butcher's paper or even wrapping paper works too. Shoot your first shot at no more than 10 or 12 yards to make sure where your pattern is actually hitting and then back up in 10 yard increments until your 10" pattern holds no more than 100 pellets. That's your absolute max range, though with heavyweight and TSS loads, that a good bit past what we would call an "ethical" shot on here...
