Looks more like a case of needing to use the right gun to begin with. George Adamson, the husband of the woman who wrote “Born Free” hunted man-eating lions with a double barreled rifle. Lots of folks have successfully hunted grizzlies with a bolt action.
Agreed. Looked like idiots using the pissant 5.56mm that is best used for varmints and no larger.
Cant be sure, but that looks like an SCAR rifle chambered for the 7.62x51 NATO round. (civvy equivalent .308 calibre) The NATO specs are 147 grain bullet at 2,800 fps with 2,437 ft. lbs. of muzzle energy. That round is usually more than adequate for most large sized game animals. Shot placement is always the most important consideration.