Food for thought, read this post over in the Wildcat section:

Not really a New Wildcat, But What a Case!

John-if I was into shorter cases you can guess
what I would do with it.It has a thick base so
it is easy to belt.I would make .550 cal straight
belted case.If I had case here I could have one
done in couple hours.Using Chey-tac brass would end up with case about 3.12 long.Ed.

Now for you folks who want a case without a belt,
you could still easily build a 550 cal, by straightening the sides so shoulder is .620 up
from .600. Base is .633 already.You would
have a decent taper to sides and a .050
shoulder to neck difference.Neck would be .670
with .550 bullet. This caliber would be the
hairyest ultimate wildcat on the Chey-tac case.Ed.

Once we have a good supply of 600 OK cases, I plan to build everything from a .338/600OK to a 585 /600 OK on that case!-Rob

I wish you guys lived over here, or vice versa.

Karl.

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Happiness is crazy gunsmiths.

Robgunbuilder!

Would a 585/600 OK have higer veloicty than the .585 Nyati???