Stick is right on ditching the bipod, and get a rear bag that the shoulder pad is past the pad (doesnt’ hook it).

The rifle needs to be in a “natural aim” or “neutral aim” - meaning when you release the pressure from the rifle with you hands it shouldn’t move... if it does you and or the bags and bi-pod are putting energy into it and if that isn’t done exactly the same way every time it will move where the impact occurs.