#1 - aw h.o.'s were neutered so it isn't an aw leftover...it was a waste of ammo; and yes, it was a perfectly real tactic - the later us planes had significant advantage in pacific; R.S. Johnson did it too -- a clean shot with 8 .50's was a clean shot with 8 .50's. HO shots are quite easy to evade, unless you are just whipped out of e; then, well, h.o., tail-on, side-on, etc.