We've killed them in our group with bows, muzzleloaders and all the different 300 mags on a yearly basis. We finally lost a bull in 2007 with a 300 win mag. The issue was shot placement, that is the key no matter the weapon. My sister shot a bull with a 260 remington a couple years ago...shot placement one shot at 30 yards and he dropped in his tracks. Last winter I found three lost westside elk at work , a modern bull and two bow cows. The only thing is you can usually find the arrow on a bow loss, from my unscientific analysis, don't use muzzy broad heads, all the dead elk with arrows I've found, and random broken arrows laying in the woods have had muzzys on them=)