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oughtsix
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New barrel
Sep 11th, 2021 at 3:10pm
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Got a new barrel today, assuming 7.6 is caliber, what do the other #s mean?

Thanks

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beltfed
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Re: New barrel
Reply #1 - Sep 11th, 2021 at 4:22pm
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7.6 may be bore in Millimeters
beltfed/arnie
  
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oughtsix
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Re: New barrel
Reply #2 - Sep 11th, 2021 at 7:46pm
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Got a pm to post  numbers as photo is poor

7.6mm.    2/400

Primakruppscherr Gusstahl

  
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OLD TUCK
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Re: New barrel
Reply #3 - Sep 11th, 2021 at 8:31pm
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7.6 mm = .2992 inches.   7.6 divided by 25.4 =.29921"
25.4 is the divider for Metric dimensions in MM or milimeters. If that 7.6 is the Bore diameter then if you add .003 per side you come up with a Groove diameter
of about .305 thousandths. So slug the bore to check. HTH Regards, FITZ
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jfeldman
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Re: New barrel
Reply #4 - Sep 11th, 2021 at 8:52pm
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7.6 mm is the common bore size for the 8.15 X 46R German barrels.  The other numbers I don't know but there is a lot less information there than I'm used to seeing on the bottom of those barrels.  Maybe some numbers from the proofing house?

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Joe
  
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Schutzenbob
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Rheinisch-Westfälisc
hen Sprengstoff-Fabriken

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Re: New barrel
Reply #5 - Sep 11th, 2021 at 9:18pm
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"Best Quality Krupp Cast Steel"
  
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texasmac
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Re: New barrel
Reply #6 - Sep 13th, 2021 at 12:48pm
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I don't know about the 7.6mm, which is likely the bore diameter, or 2/400, but PRIMA KRUPPSCHER GUSSSTAHL (spelled correctly) is German for "Great Krupp Cast Steel" or "Best Quality Krupp Cast Steel" as Schutzenbob noted.

Wayne
« Last Edit: Sep 13th, 2021 at 12:55pm by texasmac »  
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