I have a Steyr 1890 rifle sent home in WW2. The barrel was packed with grease until February of this year. I tapped lead down the barrel end and it measured around .312 to .314. The chamber end is .434. I easily un-screwed the barrel shroud and it is marked 7.7mm. This gun has the "S" stamped on it, but also has late model K98icon ramp sites according to a person on another forum. I cannot chamber a 8mm Remington Mauser round, it hits on the shoulder. I managed to get a AK47 spent round about an inch into the chamber and applied a little pressure with the bolt and it left a partial ring around the case at the inch mark. The Mauser round measures .467 at the rim and .427 before the shoulder. I am thinking broken case, but do not see any brass. I will try and upload pictures but am at a loss as to if it is a 8mm or a re-barreled something else. Any help would be appreciated.
Lyle
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