If you checked every stainless barrel of every rifle, that every major arms manufacture, that still use the button cut rifling method, you would probably find this on just about every single barrel. The ones that hammer forge their barrels do not have this problem, but in many shooters opinion, they are not as accurate as button cut rifled barrels. The reason that these manufactures do not lap their S/S barrels, is purely economics, it takes time and effort to lap thousands of barrels, and time equals money. Of course the top quality custom barrels makers lap their barrels, so that is already done when you get it, that is also why you pay the premium price.