Dave- I wouldn't worry about the Weaver pivot mounts. They are rock solid. I've used them for years on a Rem. 742, a Marlin 336, and a couple of Savage 99's.
I've never had one fail to return to zero, and have never inadvertently bumped one out of position while carrying in the woods.
In all fairness, I can only remember a couple of occasions when I had to use the pivot feature (fogged lenses), but didn't see anything to shoot either time, so there's really not much utility for it with a quality scope.
What they are great for, however, is mounting a scope low to the gun. I haven't seen any other mounting system that can get a scope lower.
