I agree with Just C about Remington brass being OK!!! I have always had really good luck with their brass. I haven't had to turn any of it to get good concentricity in the neck. I usually find that a set of lousy dies are usually the culprit for lack of concentricity. I like the Remington brass better than the other upper line brass because the brass in the upper line stuff is too soft. I hate shooting something hot and having to hammer the bolt open when that buttery soft brass extrudes itself into every orifice in the bolt. I just anneal the necks on the Remington stuff to seal the chamber better. I have both a 30Hart and a 300 ultra sendero sf. I like them both and they both seem to like Remington brass!!!
My 30 Hart is runnin 2922fps with a 220SMK.
Quite slower than Boyd's Ultra Mag. That's why I'm gonna have one for the longer stuff without having to go to the 338-378.
Accuracy wise its apples to apples.