After some calculation, "248" IS the plug gauge pre-rifling diameter for 7mm. I didn't think to run the numbers until I noted that "Crown" over "N" beside "2,3g G.BP.(Gewehr Blattchenpulver) over "St.m.G." is the pre-1912 mark of smokeless proof of a jacketed bullet thru a rifled tube. Around 1910 plug gauge marks were exchanged for a truncated mm stamp and from this I saw there was a need for a pre-rifling diameter. If "248" was a proof date, it would also have the odd DDR mark. I learned something today and hopefully everyday.

Kind Regards,

Raimey
rse

Last edited by ellenbr; 12/17/08 01:11 PM.