Bit off topic, but thought I would canvas the brotherhood. I picked up a wonderful inter-war Teutonic express rifle today. Seller had no idea of caliber. It is a Suhl built guild gun with a Hanover seller's address on the rib. All the ususal bells and whistles (octagon to round, solid rib, express sights, etc) built on a 98 action with a three quarter length commercial mauser style stock. My assumption was that it had to be something like a 10.75x68. Only markings, other than proof marks, are a 10.9mm stamp over a number "72" and a "STMG 26 gr". I'll make a chamber cast, but any ideas what caliber I might be dealing with?
