You have the 470 capstick of course--

BUT!!

I do think Heym did make some 470 NE bolts!! A rimmed cartridge for a bolt! Unusual-- how that would be made to work reliably?

I do have a 303 jungle gun that doesn't impress me and doesn't feed that reliably--

Reconsidering- a 7mm wildcat Ruger would have the capacity of a STW in a standard length action-that means 160 gr @ 3200 fps- interesting indeed!