If this individual wants to use his pea shooter magnum, let him have at it, I doubt that Mr. Grizzly bear is gonna be too impressed with it. Energy is one of those figures that needs to be taken with a grain of salt, as it means absoutely zilch, when comparing a smaller caliber, to a larger caliber. I would take a .338 Win Mag loaded with 250 grain NP's anyday, over that ultra super duper magnum shooting a .308 caliber 200 grain bullet. Lets face it folks, paper ballistics are just that, uselsss figures that mean very little in the field. Lets put this in perspective, the .338 Lupua firing a 250 grain bullet generates 5100 ft lbs of muzzle energy, while the .416 Remington Magnum firing a 400 grain bullets generates the same 5100 ft lbs, which one would you rather have on your side when a cape buffalo is charging you?