I wasn't thinking gv gun convergence but general range and drop. Easy to hit bull's-eyes at 600 yards max setting, but I'm still looking for a better idea of what ack range I should expect kills in AH2.
Particularly puzzling because in several instances attackers have flown straight at and over me as close as 200 yards and escaped with no damage. Yes, I have gotten some kills, and yes, I have made sure the sight has the accurate head position, but in most instances field ack lethality seems dramatically reduced.