Im going to be building a 300 RUM, Planing on running 208-220 grain bullets over Retumbo or H1000 for steel/paper/groundhogs. My question is about what brass to run, I have run Fed and Nos brass in other calibers and been happy. Any Nosler or Federal brass for the RUM is out of stock or priced way to high. Remington brass is available but, I have no experience with any Remington brass. I guess I just dont have the warm n fuzzy about the Rem brass because of this. So should I wait for NOS or FED or just get the Rem? I'm in no hurry.