Wildcat brass

[BodyPiercingByColt]

How would I go about creating a new caliber, starting with the brass?
I'm already familiar (read: no hands-on experience but knowledge of process and tools) with swaging bullets. However, if only for R&D purposes, how would one go about creating the brass? Casting? Trimming, crimping, and turning already existing brass? Ordering online from some R&D lab company?

I've looked all over, already, but can't find any info that's truly pertinent to my query...

[Gowking]

Fire forming or forming dies are a couple of methods. Post this in the reloading forum and you'll get more/better information.

MRA

[Joewy]

Its not worth it unless you are using a standard already made parent case.
You need deep draw or extrusion equipment to make the shell, a lathe to turn the extractor groove and a press to bunt and punch the primer pocket. From there most reloading dies will work to taper the case and neck the case.
You can do the cases on a 5 ton arbor press one at a time but at best you could draw one case in 3 or 4 minutes. A medium quality deep draw die would have 4-6 stations and you would need to aneal after the third draw. It would cost you in the $10,000 range at a minimum for the dieset.
Lots of work little return.

[BodyPiercingByColt]

Thanks for the info so far, and I will repost in the Reloading forum.