Gentlemen and Ladies,
I don't know how many of you are aware of a company called Quality Cartridge, but for those of us who enjoy working with, and owning esoteric chamberings, this is an outfit you should become acquainted with.
I recently received 100 cases of properly formed and headstamped 9x57mm. They are little works of art. No matter what chambering you have, if they don't carry the cases, they'll make them for you. And believe it or not, Quality even offers loading too.
Check'em out....it is easier to form some shells, and in almost all cases it will cost somewhat less, but there is much to be said for having the proper brass.
They have a catalog downloadable as a PDF, but I could not download it from any but the home page. There it will download fine.
Disclaimer: I do not know the owner of the company, am not getting any favors or kickbacks or free brass, just passing on the info for those interested.