Steve,
That is a consideration, when fitting them up. In factory mount parts, there is a small vertical section on the hook, that bears on the "plate". These two parts are usually mated to each other under hydraulic power, and fit very well. This will hold the scope, unless "rounded "by the gunsmith. Of course, "shop made" parts may or may not have this feature. The "feet" can't be fitted this closely, because there must be enough clearance to allow them to swing in an arc, the other side of the "feet" is under spring tension. This part holds the scope down, and side to side; the "hooks" have to hold it "fore and aft". I would say this set up requires careful fitting, but all claw mounts do.
Mike
