ORIGINAL: Arthur P
The way it was explained to me is, If you were to drop a bullet at the same instant you fired one from a level barrel, they'd both hit the ground at the same instant. Just that one would be at your feet & one would be downrange somewhere.
That's only if you fired the bullet level to the ground. You gotta take launch angle into account too.
Anybody's brain hurtin' yet? [8D]
Firing it level removes launch angle from the equation I'd think. I guess if you knew that the highest point in your trajectory was, say 3" above your line of sight then you could try & toss one bullet 3" high as you shoot the other & it would work.

Just seems like too much trouble.
That BS behind me, I think your absolutely correct in that air has a very big effect on trajectory & that at longer distances a heavier projectile can overcome the trajectory advantages of a lighter faster one. But theres so many variables in archery that it makes my head hurt sometimes. I would think fletching would have alot to do with retained velocity. I like feathers because theyre lighter & my broadheads fly better with them.
That said theres no doubt in my mind that they drop faster at longer ranges than the same arrows with vanes, its not much but its there.
Theres much more to this archery thing I'm finding out, than just buying a bow & going hunting.