This one....I'm a little partial though, as I helped design it.
GA Precision built 6.5 SAUM, soon to be re-named 6.5 GAP as that will be the headstamp on the brass.
This rifle/barrel has 3000+ rounds through it, and will see a brand new barrel sometime this winter. During two hunting seasons it has racked up 16 one shot kills on big game including elk, mule deer, antelope, and black bears. shots have been from 40 to 613 meters. It likes 139gr scenars at 3100fps.