I had that problem with a recent Savage and found that the problem wasn't on the front of the bolt, but the rear. I had trouble with a bolt refusing to lock and found that the bolt assembly screw was loose. It's part #3 on this schematic
The drawing shows a flat slot on the screw, but the current version uses an allen-head machine screw. I tightened mine with a 1/4" allen wrench and the problem went away. Check the other end of that bolt and see if the bolt assembly screw is loose.