Rifle Gauge Table
A brief table that is pretty helpful for pre-WWI German rifles shows the use of fractional 'gauge' numbers for barrel diameters. This was largest plug gauge diameter that would fit in the bore. The British proof law of 1868 had set up standard gauge sizes from .300" (172.28 gauge) to .450" (51.05 gauge) in .010" increments in the same sense that a shotgun bore is gauged, by the number of round lead balls of that diameter that make a pound. The Germans adopted this somewhat awkward system as well.
Gauge - inch
51.05 - .450
54.61 - .440
58.50 - .430
62.78 - .420
67.49 - .410
72.68 - .400
78.41 - .390
84.77 - .380
91.83 - .370
99.70 - .360
108.49 - .350 very common on 9,3mms
118.35 - .340 somewhat common on 9,3mms
129.43 - .330
141.95 - .320
156.14 - .310
172.28 - .300 very common on 8mms
These are most frequently seen with a / instead of the decimal point, as in 172/28 or 84/77
I pulled this from the German Gun Collectors Assoc.,so I'm not concerned whth the bore size, as you can see 118.35 is comon in 9.3's.
Just tried another shot at a cast, failed again, my plug was not tight enough. try again tomorrow.
Miller, I smoked up a empty RWS 9.3x72R case and it gets stopped at the front of the case. If the 9.3x72R Sauer has a slight bottleneck isn't this what you would expect?
Thanks to All, Jerry
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