What powder is most likely to get over 3200fps. H1000, Retumbo, RL19, RL22, IMR 4831, or IMR 4350. Seems like the slowest powder would, but the Nosler manual seems to favor RL19. I am reloading for a friend, who says his 26" MarkV groups best above 3200 with 180grainers. We are using accubonds and Btips. Also have Weatherby Brass, and Rem 9.5's or Fed 215's.