Could have something to do with it. I don't dial my hunting scopes ever. They make MOA and Ballistic reticle for a very good reason. Speed on target is often the difference between meat and no meat.Just dial them up and down for a while... you'll see why! Returning to zero... That's where the issues have been determined!
FWIW!... I have about a dozen Lupy's that have held zero if I never moved the turret!
I have one VX6-HD and three VX-5HD's. This is the first that I have to send back.
But... I've read of other situations, where most of the "send back scopes" have been the ones that get dialed.
Please correct me if I'm wrong!