I would think it all depends on your variables. Such as how far out is the target, (whatever it might be) How fast (speed) is it moving, which direction is it moving, The size of the target and the speed your arrow will arrive at your point of aim or projected impact. Knowing your weapons capability if you have to perceive where the target is going. Say you have a friend throwing discs in the air at a reasonable distance. The target is not moving as quick and you "might" pick up the trajectory easier and not lead hardly at all. Say a pheasant breaks up (they usually get straight up as high as say the nearest fence row hedge then away) not as quick and you have the time to pick your spot and not have to lead much also. Now say Ole Ruffed grouse bust loose from cover which is usually thick (hitting them with a scatter gun is hard) going all out, the spot your picking is going to be where you anticipate the bird is going to be and by the time you draw hope you can even see the bird or where it is heading. The same would go for pass shooting Ducks/ geese etc. The speed at which they are going, the direction and such to anticipate where there going to be and the spot you pick for the impact of your arrow. If I make my thoughts clear for you. I am scant of any kind of expert and this is just the way I see it. Practice ,Practice, Practice and just like shooting at still targets or say a running rabbit, the more you do it the better we get (Or at least we hope so) You will get a feel for projecting where the target and your arrow will meet. As I stated I am no expert or practice such Ariel feats. My main Hunting with a Trad Bow is for the Whitetail. Hope this at least gives you some food for thought Brother and let me know how your journey goes. Best wishes.