The tech polished the crown, installed new action screws and did a few other things too, as well as shooting the rifle. He said he got approximately an inch group at 50 yards shooting a 180 grain bullet, and got approximately a ½ group at 50 yards shooting a 150 grain bullet. They shipped it back to me, and my hope and expectations were high."
Is there any chance that the problem you are having is caused by the ammo you are trying to use? The factory said that the group doubled to 2moa when they went to 180gr. It seems to be very ammo sensitive.