Bare with me here. With the slightly shorter case and longer neck the 33 Nosler case seems ideal to neck down to 7mm. I know that the 28Nosler is available but a 33Nosler case necked down with a 195EOL or 180ELD-M loaded above the neck/shoulder junction will feed from an AICS mag and leave room to chase lands a bit. 33 Nosler Neck/Shoulder Junction: 2.131 Berger 195 Bearing surface + Nose length = 1.398 This gives a COAL ~3.529 obviously with some production variation from both bullet and case. This also gives a neck length of 0.329 for some flexibility. It'd be an easy reamer, and case forming can be done with a bushing die from Redding and a couple bushings. Neck turn/reaming would be necessary. You should be able to use a 28Nosler seating die (Forster Ultra Mic, my favorite) and the Redding FL S bushing die for case forming/sizing. See any flaw in the logic? I know I can just chamber in 7STW, 7-300WM, or just get a 7RemMag. Heck 7mm Blaser is also available at a bit less case capacity, but dies for that would be custom orders for what I'm used to using. No belt, nosler (norma) brass, long neck, 35 degree shoulder, standard mag bolt face, and AICS mag feeding, what's not to like?