Brass availability has kept me from experimenting with the SAUM. Sure, it's available now, but in a couple of years I wouldn't bet on it. I own a few 350 Remington Mags, and I'm not about to jump in that pit again. When my 6.5 WSM barrel's accuracy starts falling off, I'll probably retool with a 6.5/06AI and go that route. Even WSM brass is hard to find unless you wanna pay top dollar for mediocre brass.