buckshot does a very good job for Ariel Hunting with the shotgun you don't need as many rounds as say the AR15 or 223 but you do have to get closer, judging from the pilot in this video thats not a problem.
Not a fan of hei hunting ,but you blokes pick the meat up at the end & a bullet's got to be better than a belly full of 1080. Stay safe & leave a few for the foot hunters.