I stumbled on the 6.5 mm SAUM as engineered by George Gardner and built by GAP precision. There is a very informative article on the Snipers Hide about it.
http://forum.snipershide.com/snipers...-6-5-saum.html
It's a necked down 7mm saum / 300 saum.
But with H1000 they are getting +3000 round barrel life. And it's pretty fast! It's the low pressure they are able to pull off. Similar pressures as a .308 !
Really easy recoil with the 6.5 mm.
It's winning a bunch of competitions right now.
Headstones brass will be available this summer /fall.
I'm researching for my first build and this seems like the perfect hunting gun while still being able to shoot it at the range all day. When factory brass becomes available I think it will be very popular. I encourage you to read the article before commenting. It's long, but worth it.