In my search for mounts or a rail for my new rimfire purchase I came across these.
I like the concept and according to their sales pitch they are guaranteed centered to the dove tail the way they are made. And they are made in the USA, supposedly in Texas. I have a SWFA SS 16x sitting around doing nothing so I guess I will do some measuring and see if their high rings will do it.
Hmmmm... seems like marketing for a thing that, kind of isn't a thing.
Granted cheap rings will often be off center. Though quality rings, dovetail, weaver, picatinny... regardless of style... have always been centered for me, so long as it's a quality brand.