This next fall I have been invited for my first elk hunt with some local guys. I have been looking for the best elk factory loads for the .280. The federal 150 noslers do real well on whitetails but was looking at the fed. High Energy 140 gr Bear Claw Premium loads which are must faster that other factory ammo. Federal also makes a 160 grain Bear Claw but not in the High Energy loading. Any ideas on what factory loads would be best? thanks!