I was having a great day at the range when after firing about 200 rounds of different manufactured (head space checked each time lot changed) rounds the weapon stopped feeding. I couldn't even get it to feed by manually cycling the action. The cam screw was tightened and backed off 1/4 turn, correct 762 links and booster. The rounds do fit tight on the trunnion/feed way area. There is a brass mark on the left front 308 cartridge guide. When looking at the weapon from the top with the feed tray open I can see that the left rear 308 cartridge guide sits back about 1.5 mm from the bolt when the bolt locks up. Did the guide wear? I was using the same rounds since the build and up until now its been running like a top.