Never used BH on Crota. Did use it on walkers tho. Having to fire so much ammo into ONE enemy was aggravating and BH helped to alleviate those frustrations of not having ammo when I reached the REAL boss, Sepiks or Taniks. Now I have to grind, ugh MORE grinding, for glimmer to buy special ammo synth to replenish the ammo burned on a mid-strike boss that's more difficult than the end strike boss... Yay! :-/