Lots of variables to consider here. Rifle, scope and mount will change things. How the rifle falls changes things, too. The surface it's dropped onto would likely matter most of all. The worst zero shift I've ever experienced would have involved a 742 with see through mounts and a k2.5. The rifle was slung, I hit a slick spot on an uphill gravellish path, and fell over on the rifle. It went from a solid 100 yd zero to no one knows. There wasn't a sheet of paper in camp big enough to get shots on paper even at 25 yds.
