I recently picked up at an auction a bolt gun. Literally one photo but decided I’d throw a risk out and put a bid in…I won. So it came and I’m trying to figure out just what the hell I have now. Looks to be a Surgeon action, McMillan stock and carbon wrapped barrel. There are no other markings on the barrel besides 22-250 REM on one side and Valhalla on the other. It has the appearance of a proof barrel and measures 24”. I’m trying to figure out without disassembling the rifle what the barrel manufacturer is. I can’t seem to find a Valhalla barrel anywhere and Proof won’t respond to my questions. Any idea?