hum.... probably would be too fun to turn the neck down on that brass. I have been thinking about a 22-6mm Rem. I currently make my 6mm Rem and 6mm Rem AI from RWS 7x57 brass. It is great stuff and harder than anything else I have ever touched! Might could neck up it and make 6mm Rem brass, by would probably still have to turn a lot off the neck.
Thanks, tiny