I’ve settled on 54 gr of RL15 with 250’s in Remington and Federal brass. That’s is max for that brass and gives me an average of 2450 fps over the chrony. If I want more I switch up brass and run Hornady and Nosler brass which will handle a bit more powder and get me safely to 2650 fps. Or some CFE or MR2000 eels out 2700+fps. All across the chrony and real world speed. I’m quite happy with 2450 fps and that will kill anything on this continent.
