Just took mine to the range for the first time. Still single feeding it as I've yet to open up the feed rails to allow the fatter case to be pushed into the BDL mag box... Just did a ladder test with 2 rounds of each powder charge from 86-89.5 grains of retumbo with the 215 Berger Hybrids. Seating depth was 2.670" measured from the Ogive. It was 95* today with zero humidity and I was able to run up to the 90.5 grains but was seeing a pretty flat primer and slight extractor mark, I'll be running 89 grains of Retumbo and will play with seating depth. Barrel really settled in after 5-6 shots and I had five consecutive shots of 87.5, 88, 88, 88.5, 88.5 all in the same hole with one flyer. .35 MOA group and that's not even tuning seating depth.
Hopefully will play with seating depth and get 'er tuned up a bit more and send some rounds over the chrono. Hoping for 3100+ out of a 27" 1:10" twist Rock Creek cut rifled... This thing is going to be stupid accurate I can tell you that!
Mike