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Old January 22, 2012, 09:42 PM   #2
SHR970
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Join Date: January 24, 2011
Posts: 484
Unless it is a commercial action it is .323. Some commercial actions were .318 into the early 20's. .318 is from the 1888 comission rifle.

The 7.92 X 57 I (not a typo) is the Infanterie round (.318) and used in the 1888 comission rifle.

The 7.92 X 57 IS is the Infanterie Spitzgeschloss or Infantry Spitzer (.323) and was officially adopted in 1905 and was in standard use throughout WWI and beyond.

The reason that you commonly see it listed a JS is that in old Euro. font, a capitol J and capitol I looked the same. This is the same reason that there is no J street in Washington D.C. (see snopes for this one).
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