Yes, I'm very familiar with Nate's 7mm's. It is the reason that I went with the WSM.
What he is using is a 300WSM necked down to 7mm. He looses a little case capacity, but gains the longer neck and better brass.
Nate makes awesome rifles and does fantastic work. He'd rather have the longer neck and loose a bit of fps with the better brass.
I'm willing to split the difference. I want the better brass, keep the fps, and loose the length of the neck.
I'm not sure with my skills that the length of the neck is going to factor into my accuracy. Basically, that would be the one thing I would be willing to loose.
I'm just not sure that I can make 7mm brass from 300WSM Norma brass.