That is not quite enough. Not only never shoot them, but never operate them. Take a gun home from the store, wrap it in oiled cotton wool and store it in a locked box in a safe to which no one has the combination. Then it won't ever get that "ring".
Seriously, some guns, like S&W revolvers, are designed and made to have the cylinder stop drag. It does no harm except to remove blue in that area. Some other guns, like the old DA Colts, were timed to have the bolt (cylinder stop) drop in the leade, but the bolt springs are strong and will peen the leade. Even so, it would take centuries for the bolt to seriously wear the cylinder.
In any revolver that I know of, there is some marking of the cylinder from the cylinder stop. If the gun is timed so that the stop drops only when the notch is in the exact position, a rapidly turning cylinder will skip the stop or the rising bolt will be chipped or chip the edges of the notch, worse conditions than if the stop is allowed to drag and ride up into the notch via a leade.
Jim