Last weekend I took my 5.45 rifle out and zeroed the irons as well as my 1-4x24 in a Burris PEPR mount. Took the scope off (wont fit in the cheap red head case I have with it on) and brought it back to a friends house to clean it, then put it back in the case with the scope on to bring it home. It was zereoed at right around 25-30 yards using bulk ammo. Had a good time shooting it and had some good groupings for being new to the rifle system as a whole.
Took it to the range yesterday just to plink and at 25 yards I wasn't even on paper. It was so high that I was hitting the concrete berms above the target area and way off to the right. The rifle wasn't touched in the 7 days between visits.
Could it be that the mount got moved when I put it back in the case? I haven't dropped the rifle or the scope or anything so that's not it. I am also wondering if its the mount itself causing the problem. I was under the impression any picatinny style mount would hold zero (within reason of course) but it somehow lost zero between then and now..
I am wanting to order a regular red dot for this rifle instead but I was wanting to use this scope on a 7.62x39 hunting ar that I am building so this isn't a huge concern yet. Should I pop for the more expensive Larue mount for this and be done with it hoping that will fix the issue?