I get 2865fps with the Sierra 125gr Prohunter SPT and a case full of powder, cases eject fine and the primers look like that hadn't been fired except for the pin strike in them!

I wrecked a few cases trying to get it right, I ended up running the 375Win brass into a 35 Rem die, then a 338 Federal, then 32 Special, then into a Hornady 30-30 Improved die, they come out looking almost perfect except not quite filled out in the shoulder, then turn the neck as it's a little tight in the chamber with a bullet seated if I don't, you may or may not have to do that, depends on your chamber dimensions. It's an easy hand ream, got the reamer from Fred at 4D, just do it, you'll like it, I'm gonna try to kill a deer with it this year.
Tim