shooting a few hard pellets like the Kodiak into some old blankets or t-shirts so you can retrieve the pellets and have a closer look to see if it is clipping if that's what you suspect. I like to work smart, not hard, and gather all the evidence I can to help me make an educated "guess" before I start taking something apart that may not need to be.
You could try a different scope or mounts just to cover your bases. Go for the basics first (o-rings etc..) and go from there.
Good luck and keep us posted.