I put on a rifled slug barrel on my mossberg 12 gauge 835 w a scope that was off my traditions muzzleloader. I took it to get bore sighted. Shot at 25 yards. Got it dialed in after 5 shots. Steped back 75 yards, missed target 2 times. Then got to 60 yards. Shot to the right about2 inches 1 shot and 2 inches to right and bout 4 inches high. Any suggestions b4 I buy more slugs at 13 $ a box. Can the scope not handle it. I think my muzzle loader kicked harder. Keep shootting. The scope mount is on the barrel. And scope almost touches mount on front and rear mount. Buy new scope?