I had a loose base once and the groups fired looked like 2 separate good groups about 2" apart. I finally traced it down by dry firing and watching the cross hairs randomly shift back and forth. I grabbed the scope and could feel it move just a little. It drove me nuts for a while!Is it possible for a scope to be knocked out of zero by the shot and return on its own after sitting for a few minutes?
Scope problem. The recoil shifted something against tension in the scope that would reflex back a short time later. Very possible to have this happen. I have seen this even with light recoiling rifles. I have a scope right now that did exactly what you describe. A Leupold that had a custom Reticle put in it. It was OK before. Changed the scope
and the problem was gone.
Thanks for that. Its on an AR so cant do anything about the other items.
Ok, I took the rifle out with a scope I know is good. I did ladder tests with two powders and four bullets. I cant get it to shoot better than 1 1/2" groups. It also throughs fliers several inches outside the group pretty often. I am going to try again with a different scope mount next week. Any other thoughts?