[Angrist]

But it doesn't mean that the heavier your brick is, the further it flies, right? You will reach a point where adding more weight will just shorten the flight distance.

If you took the feathers weight and put it into the form of a very small ball (or a brick), it would fly pretty far. The shape of the feather is the biggest problem, not the weight.

I guess it's a balance between weight to keep momentum, and aerodynamics to minimize air resistance.