This is the table for barrels intended for bullets, rifled or not. Again, the gauge number is followed by the diameter in mm, the powder and bullet weight for the 1st,2nd and sevice load. These gauge numbers on rifle barrels cause a lot of confusion now. They stand for the bore or laand diameter of a rifled barrel, not the groove or bullet one. Gauge numbers were used by the Zella-Mehlis proofhouse up to 1910, Suhl to 1912. Mauser, Oberndorf proofhouse, even stamped them on some barrels post-WW1. All Mauser .22 barrels up to 1945 are stamped with the gauge number "459".



http://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=213433#Post213433

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Cheers,

Raimey
rse