FYI, for ANY of the long action SHERMAN shooters, I just contacted Huntington's to try to purchase some RWS brass (Xmas present to myself). They are out and not projected to receive more before September. I am going to have to live with Norma for now.
I have been following recent developments with ADG Cartridge Brass with great interest. Naturally, I am hoping they will add Sherman, 280 AI, 280, or 270 brass to their lineup. I note with excitement that they are offering 300 Win Mag. Though I don't own a .300 Win Mag, I think this bodes well for the prospect of Lapua quality belted magnum brass being available in the near future. I, personally, am pining for .264 Win Mag, but if ADG even made 7 Rem Mag, I would buy it and neck it down.
I called them to cheer/beg for the above. They seem to be very open to feedback and I was encouraged to follow/comment on their FB page. It was explained to me that they will regularly update status on their products there, and that they closely monitor feedback of FB and multiple forums, as well as that received by phone or e-mail.
The individual with whom I spoke told me a bit about their manufacturing process and that their design emphasis is on creating cases with tough case heads (via double stamping), while preserving case capacity by avoiding excessive material thickness. Music to my ears...
It was specifically mentioned to me that ADG is working with Rich to offer brass for his SS and SST designs in the near future, as a derivative of the SAUM cases they intend to offer.
If you are a SHERMAN shooter of ANY flavor, I strongly urge you to contact these guys to express your interest in their brass. THEY ARE LISTENING!!!