The factory ammo from Hornady shoots well, but is NOT loaded to the potential of the cartridge. The velocity of both loads are well below that what is listed in their own load data charts! Their load data is admittedly on the warm side..... My rifle is a 24" barreled Fierce Fury and is a genuine .5min shooter with both kinds of factory ammo and my hand loads using the 147gr Eld-M and 140gr Nosler Partitions. Best powders by far for me have been RL-25 and Norma MRP (highly under-rated IMHO) Velocities with both easily exceed 3100 and case life has been very good. Now if only Lapua would make us some brass!