I have the mag bolt as does my father. My gun sits in the safe and hasn't moved in like 8 years, neither has my dads. We both shoot Omegas now. Either way, I feel your frustration with the mag bolt. I could not get a decent group within 6" and my father was lucky when it found paper. Both of us has great optics and take good care of everything we own. I chaulk it up to that model CVA being just a low quality gun. CVA does make other very good guns but that one forget it. Maybe on the ML page sopmeone will have some advice for you. I know I spent enough money on bullets and what not with that thing to last a lifetime trying to get it to group.