RE: Most stable scope mounting system???
For weight/strength, the Weaver base setup is about as good as it gets, frankly. Beyond that, and a LOT more costly, are the Leupold Dual Dovetails and Conetrols. Any of these are about as strong as they can get, and a lot better than the twist-in front and the rear that just sits on the base with opposing screws (Redfield and Leupold style). Since the rear ring will sorta just "sit" on the base with the opposing screws keeping it from flopping, they are POTENTIALLY the worst type, though not necessarily. In any event, if all the screws are checked regularly, and often, they all work, some just work better in the strength/weight ratio.