its not the scope and barrel lined up its movement in the stock and barrel moves point of aim when you shot and makes your rounds go all over the place bedding the stock and barrel will stop this movement and I would bed full stock this has worked for me in all my ML its not a centerfire and yes you can have very little flex all gun do bedding full stock can help stop this did you see of you have movement betwene your stock and barrel plus when you put your ram rod in your gun put your fingers betwene your stock and barrel and then push your ram rod in and see of there is movement it will move the barrel up you do not what this