Finally recieved my Pac-Nor bbl in 6XC this week, and when i put the headspace gauge in the chamber, it went almost flush!!! No extractor groove sticking out, only about .010-.020 above the flat of the bbl??????? A new case, sticks out with the extractor groove showing plus maybe .010......Gauge is marked "6XC". From a well known supplier.......If i did set bbl headspace by gauge, it won't even be close to chambering....Send it back??? Thanks for any help...rsbhunter