Use only Lapua brass, the other brands may not extract well due to the rim size being a tiny bit smaller (and not perfectly round)... I've had trouble with Hornady brass, and I've seen others have issues with S&B once fired brass. The Lapua brass works great.
89.3 grains of Retumbo, and take advantage of the 9 twist and use 300 grain bullets. I use 300 grain Sierra Matchkings... CCI 250's or Federal 215's work the same.
This load shoots great, even at 1 mile... it runs 2700 fps from my rifle.
Here are a couple test targets I shot while tuning the cold clean bore shot to stay as close to the group as possible (we do this during the OCW consulting service)... the load works.
Dan