Anyone had this problem...?

[mosigdude]

Ok, thank you very much for the responses. It sounds like the scope may be the culprit. I just wanted to make sure that this wasn't going to be a problem when the rifle gets topped with a more expensive scope. I've shot many rifles and have never before had this happen, it was really odd to have it happen twice on the same rifle. It must be the combination of semi-auto and the sharp "blow" of the buffer hitting the rear of the tube. Now to replace the chrono...