First - who made the rifle?
Since the bolt will go into battery when no round is present, the inference is that the basic mechanical relationships between bolt and barrel/trunnion and such are all fine. That would imply that something is keeping the round from fully seating in the chamber.
I vote for a case neck that was ripped off an earlier round and is obstructing the chamber. That can be hard to see sometimes, since the case will be flush with the chamber walls.
-A conclusion is not a destination, it's simply a convenient place to stop thinking.-
-Reading a thing doesn't automatically make it so; repeating it doesn't necessarily make it any truer.-
-Every Texan should be a member of the Texas State Rifle Association.