I truly believe the gamey taste comes from adrenaline. When I gun hunt, I always aim where the neck and shoulder comes together to drop them instantly. I do notice a difference in the meat of bow kills that run some distance.There would be adrenaline in a deer running and none when one is dropped in its tracks, that literally does not hear the gun go off. By that, I mean that a bullet travels much faster than the speed of sound, so it actually kills the deer before he hears a thing. No sound, no fear, no a drenaline. It's my theory anyway!