That's the same Hornady manual that I use. My .300 WM likes H1000 with the 200 Gr ELD-X. Best group on mine was 74 Grains, but I use 76 Grains for hunting. It groups .02 larger groups on average at 100 yards. Muzzle velocity is just over 3000 FPS. I have not stretched it past 340 meters yet.