96 grains Retumbo nets 3200 FPS with a 200 grain accubond in my buddies 300 RUM. Max charges in my Nosler manual are:

91.5 Grains RL25 at 3185 FPS
95 Grains Retumbo at 3187 FPS
98 Grains Magnum at 3191 FPS

The 200 grain accubond has a .588 BC and nearly identical in trajectory to the 180s because of it high BC.