Love Snider by Marrakai.

Thanks Lars for your research. The .450 Eley No1 is its own. There is a few companies that makes custom brass if one supply them with case specs. I might order some...however the next thing is reloading dies. That too is a custom thing.

From George Hoyems book `The history and development of small arms ammunition` Vol 3(1985)

Maybe a shorten .450 nitro case will do the trick on this one.