If your position isn't changing by much, nothing is loose/screwed up equipment wise and its not far enough for the wind to screw with things; 90% of problems stem from:
- a change in how you are holding/influencing the gun with your face/head/shoulder/rearward pull weight
- the rifle isn't packed down enough into the rear bag and the stock end is moving around; most people don't realize that you need to pull the rifle back rearward first and then adjust the height with the rear bag while keeping the rearward tension. Something weird happens if you do the rear bag first and then the rearward pull second.
- you are pulling the trigger different/crushing the trigger/anticipating recoil/ no follow through
Focus on one of these per string to get it 100% right and see what happens.
- a change in how you are holding/influencing the gun with your face/head/shoulder/rearward pull weight
- the rifle isn't packed down enough into the rear bag and the stock end is moving around; most people don't realize that you need to pull the rifle back rearward first and then adjust the height with the rear bag while keeping the rearward tension. Something weird happens if you do the rear bag first and then the rearward pull second.
- you are pulling the trigger different/crushing the trigger/anticipating recoil/ no follow through
Focus on one of these per string to get it 100% right and see what happens.