I just looked at a 336c in .35 remington in a local pawn shop. When I opened the bolt, I noticed that where the top of the barrel meets the reciever there is a piece of "chewed-up" metal. At first I thought it was some kind of build-up, but I tried scrapeing it out with my thumb nail and its was definitely steel. It looks like there is a lip on the top edge of the barrel where it fits into reciever that has been damaged. the bolt still closes and locks, but i noticed that the bolt is forced downward slightly when it reaches that point. Anybody seen this before?