Absolutely not my pie, .303 British. So please some clarification of the origin of this cartridge?
Patronenfabriek, Dordrecht, Netherlands 2 is lot number and 1930
BUT are they .303 or are they 7.9 x 57r see thread - .303 from the Netherlands
I took the caliper of course. It is a 7,92 x 57 R indeed that sneaked into the drawer of the .303.
You are not the only one me too :-)
As ponted out, there was recently a thread on this same sort of mixup. A most interesting and unusual cartridge.