I think every Ruger I have ever seen had that scratch mark where the cylinder stop drags on the cylinder before engaging. Most revolvers seem to have this if they're cycled much at all. I admit, it bothers me. I have a colt navy reproduction with 500+ rounds through it and lots of non-firing cycling and it doesn't have a ring; the cylinder stop drops into the groove instead of dragging along the cylinder. I'd think that a Ruger, which is about 10 times more complicated internally than a colt navy, would be able to achieve a bit more precision here. Is it possible to tune the timing to solve this or am I just being too picky here? Or does the cylinder stop dragging on the cylinder have a purpose such as preventing the possibility of over travel and locking out of battery?