A question arose on the Rimfire Central Military Trainer forum, questioning the M1922M2 barrel stamping, "Long Rifle Cart'ge Only" which appears upside down as viewed from the left side of the rifle. I have a similarly stamped M2 barrel. Has anyone else seen this "upside down" stamping on their M1922M2 barrels? Any opinions as to how or why this might have occurred? Opinions seemed to feel that an early Monday morning stamper may be the cause.