I'll be like everyone else and give you different info than what you want. The 6.5-284 is considered a overbore barrel burner. I have one and to my understanding slow cleaner powders are better for load development and barrel life. H1000, Retumbo. No sense burning the barrel out doing load development. I started with IMR 4831 and it was very accurate but the speed wasn't there. I use Retumbo in a hot load to get 3000 fps. with 140 vld's.