Quote Originally Posted by earl39 View Post
You might want to check your ring alignment. If you are going thru scopes on a 308 then i would be looking for the cause. Cheap scopes maybe but better money is betting on misaligned rings. Properly lapped rings should go a long way towards solving the scope problem IF everything else is tight and there are no other issues with the rifle.
That's what I was thinking. Cheap unlapped rings, or a warped scope base, or two piece scope base misaligned.

Warped tubes are bad, and you can have rings that barely make contact.