I have a leupold 6.5x20x50 scope that's been mounted on a 300 rum everyday of it's life except when I had a new barrel put on the rifle . I can say without a doubt that I've never seen it loose zero I have a jeep on 35's and everyone knows how ruff they ride I also last year while deere hunting travel a rocky rocky servaying trail up the side of the mtn on my four wheeler . I had painted my factory barrel and action with krylon paint(befor season) I sanded it down primed it and then painted it and by the end of the season you could see several places on my barrel were the factory stainless was shining through I was really ruff on my equipment last year. one time while walking down a steep holler both of my feet slipped out from under me ,the end of the butt stock slammed into the ground with all of my 225 pounds behind it . still no problem with loss of zero If my life depended on it I wouldn't hesitate reaching for my leupold.
Bigbuck