I've never had a scope go out on me and this includes 300 WM's and all my scopes have been Leupolds. I used to use Buehler mounts and rings and now use DNZ. My point being that maybe how the scope is mounted might have something with it going bad. I also use a lead sled as I now have to shoot left hand rifles after losing the vision in my right eye and have experienced no problems using it. I might add, after 50 years of Gunsmithing I've never had a bad experience with a Leupold.
