I'm not a gunsmith but I shoot a lot and see a lot of issues at the range. I'd throw a totally bogus statistic out there that better than 70% of scope issues are cause by being improperly mounted.

How many here have actually taken a brand new set of rings and without doing anything to them just drop a lapping bar into them to see how out of round and alignment they are? I'd say not many. Well I have and it's the reason why I stick with top screw rings like Warnes. I still drop a lapping bar in those but typically I don't see nearly the issue like with side screw type mounts.

To add another point. I have a $49.99 Bushnell special on my 45-70 Marlin Guide gun. It's in quick release Warne's mounts and hasn't had an issue.

Tom