I was using 2 sandbags and the rifle was stable. I am new to shooting the 3006, but not necessarily to rifles in general. I do have more shotgun and pistol experience however.

Now, i was able to get 2" and under groups with the winchester 150 gr bullets. They were pretty damn accurate at 100 yards. In fact i shot a group of 4 and ended up with 3 holes, one being elongated. Not to bad i would say. But as soon as i switched to the 165 gr Win's, the group was close, just way off target by about 12" from where i was aiming (low and to the left of center). The core-lokts were just all over the place, left, right, high, low etc....

i have a crappy 3x9 simmons scope, mounted on the rifle. Came with it. i will be replacing it soon.

Granted i could have been part of the problem, but then again the winchester 150's shot very well. I guess, in the post, i was looking for opinions on the core-lokts. I have heard good and bad. I shot about 4 boxes that morning so my shoulder was a little tender.