7saum, adg/Gunwerks brass. Run a 24" tube minimum, or 22" suppressed. My one and only 7mm build is underway, it's a 7SS MAX, basically a 7mm saum w/o much taper at all, 40° shoulder, holds 78gr powder, pushes 195s close to 3k from 26" barrel. I plan to run 180s at a bit lower pressure. 26" proof sendero 1:8, lone peak razor ti long action, wyatt's cfe box, Hawkins bdl, Huber trigger and a ag composites visigoth stock. Should be under 7#. If it pans out to be everything I'm hoping, I'll be building a Tikka off same chambering, with a 22" barrel for a truck gun.