remage barrel

Looking to sell a brand new remage ragged hole barrel. Its a #3 contour Wilson, fluted, threaded and with the barrel nut, chambered in 6.5 CM. Was going to turn it into a 6.5 PRC but decided to go a different route. Asking 250 plus shipping cost.

I noticed in a couple threads that the gunsmith may have "modified" the receiver threads when new barrels are installed and that one cannot use a Remage barrel because of that reason. Aren't threads made to a spec? Can someone explain this? I got a line on an X-Caliber Remage barrel and would...