Well...it fits a 30/06 length magazine box and action, so it isn't based on a beltless STW case or RUM....both of those take a H&H length action.
I bet brass is Norma and likely thin,which may account for the case volume. I still think it's gonaa be similar to the 7 LRM,the 7mm Dakota(same thing with different head size),necked to 6.5, which boils down to a necked 375 Ruger....that's my bet,but we will see.
Anyway I think it sounds pretty cool! Gotta be a pretty mean open country cartridge.
I'd order a spare barrel right away.
The 264 Win Mag boys have been trying for decades to get 3200 from 140 gr bullets.....some powders do it and some don't I guess. Well, seems that will be a safe bet with this cartridge....so there ya go!What's not to like?
