There's at least two ways to ask this. Gun is a sub half moa shooter. From yesterday to to to day the zero went straight up 2 MOA. The only thing that could be found that was out of order was both action screws were able to be tightened 1/8 turn each. That don't seem like much. This is where I'm lacking. Any thoughts? I tightened 'em and will recheck the zero.