I bot the same 06 about 3 years ago.... If it's still in the synthetic stock, then that may also be contributing to the problem. Before I did a little bedding job around the recoil lug, mine would move from side to side. It would put 2 where I wanted them, but as soon as the barrel warmed up, it would start walking shots.... After the bedding job, It is a 1 MOA shooter @ 200 yards.