I think this is the correct place to ask. I have searched and it seems fitment of the rifle may be the cause but I would like an opinion. Issue: from prone I have a good repeatable group centered at POA but from the bench my POI shifts left about 1/2" or so at 100 and 1"-1 1/2" at 200. Question: would too short stock cause this? The butt stock is adjustable for length and I have it set short as I prefer on other platforms. It is a new rifle, my first precision 308 bolt gun. I have only been the range with it twice. The simple solution would be to add spacers and shoot again but I will attend a class this coming weekend and will not be able to shoot again before then. I would like to have the rifle set up as well as possible so I can spend more time at class working on my issues instead of adjusting the rifle. Is it common for a too short of stock to cause a left shift when going from prone to bench or is this likely just poor form on my part? Also, prone will be the main shooting position, I only noticed the change because rain pushed me from prone on the ground to the bench under the shed. Edit to add: bipod used for both positions.