Another suggestion I have when you go to sight in is to take your time. Don't burn through a box of sabots in 30 seconds. Shooting one shot then giving your gun (and shoulder!) at least a couple minutes to cool off more closely resembles the accuracy you will get in hunting conditions. (You probably are already aware of this, but figured I'd throw it in just in case.) Good luck to ya.

--Man who fish in other man's well often catch crabs--