One example: In 1927 catalog of Tiroler Waffenfabrik Johann Peterlongo Innsbruck there stands "25-35 Winchester (6,5x52mm)".
Jani:
I don't think that's what that means at all. In a European catalog, ".25-.35 Winchester (6,5x52mm)" clearly indicates .25/.35 Winchester - a foreign cartridge that uses English decimal nomenclature in a catalog published in a country that uses metric cartridge nomenclature. So, ".25/.35 Winchester" is followed - in explanation - by it's metric dimensions, a 6.5mm caliber cartridge that uses a 52mm case. I see no attempt at all there to suggest that it is the same as a domestic (European) 6.5mm caliber cartridge, that, by coincidence, also happens to use a 52mm case (6.5X52R).
I think you're reading this one wrong, Jani, and you wouldn't be the first. These have never been the same cartridge. The confusion stems from the metric system nomenclature - both are 6.5mm caliber and use a 52mm case - but they're not the same cartridge.
