Update on my 6.5PRC
I had access to the reamer, a Kreiger 6.5HV 8T blank and a Stiller TAC30AW. It took a few months to get the magnum bolt and, due to moving delays on my part, the rifle didn't get together until around May. I tested RL26 and Retumbo with 140ELDM and used magnum primers. Retumbo gave me the best accuracy at the desired velocity(due to a velocity constraint for the match).
My gunsmith talked me into an Area419 Hellfire brake and it was good advice. So I'm hitting right at the 3,000 FPS mark with great accuracy and can call my own hits due to the low recoil.
In all fairness, I noticed an issue with about 15 pieces of the Hornady brass. After one firing it was showing some pretty severe stretch marks and splitting in the necks. It was not the entire bag/lot of the brass on hand so it left me baffled. A call to Hornady was made and pics emailed to their tech guys. They asked a few questions, scratched their heads and then sent me a 50 round bag for replacement. In further fairness, I have lost brass for one reason or another from all manufacturers over my 40 years of reloading and the issue has not resurfaced.
Further note, as the barrel in my Surgeon Scalpel 300WM is beginning to age out, I am very interested in the 300PRC as a replacement.