I have the QRW mounts on my .375 and travel with an identical spare scope pre zeroed. Swapping between scopes shows no change to point of impact. In fact, I swap between scopes every other trip to the range so I have confidence that swapping is as painless as can be. I am not so much worried about the scope going haywire as I am about physical damage to the scope. Now, if I bang and damage a scope while climbing a kopje I can be back in business in a matter of minutes without wasting a bunch of time and ammo.
