It seems that the old calibers of the early 1900s and late 1800s were just so fascinating.
I got into weird calibers a few months ago, like 9mm Glisenti - an Italian pistol cartridge from world war one that was used in only a handful of weapons for the Italian Kingdom. And 10.35mm Italian Ordinance, used in only 1 gun I know of.
Then I got into even weirder calibers, like 10.75x68, a big game caliber used in German colonies such as Namibia that fell out of fashion because of anti-German sentiment in WWI.
Other nations created their own big game ammo and African loadings for their colonies. Germany had a few, England had more than anybody - but what about Italy and France?
Did any weird loadings get produced by the citizens of these nations for their own colonies?
(ps- yes, italy had colonies. I have no idea why! Marble exports? Tomato plantations? Catholic missionaries preaching the gospel of olive oil?)