bulldog563

You MUST loc tite the screws on both rings and mounts
otherwise it will be a continual problem.

HOWEVER, before loc titing, make sure you use a bore sighter/
colominator to get the cross hairs as close to 1" high as possible
BEFORE you loc tie - that way when you do final fine tuning
of the scope at the range you are not winding the cross hairs a long
way.

The other thing you may want to do is get the rings aligned correctly
and maybe even polished out so they are 100% smooth - the quality control
nowadays is not what it used to be.

Anyway, good luck.

500 Nitro