I known the cartridge 577/500 Hartmann & Weiss for years, but I don't know its history, particularly how it was designed.

I have also never read a report about their use for hunting in Africa.

Hartmann & Weiss are very well-known gunsmiths in Germany but of the very upscale class and that's why the corresponding prices and the years of waiting for a rifle.

Westley Richards seems to know more about it.

https://www.westleyrichards.com/theexplo...-nitro-express/