[quote]ORIGINAL:
Actually it will vary depending on speed and drag. Weight will have no direct bearing on it.
This makes sense. Intuitively (without breaking out the old physics books) It doesn't matter how heavy something is, gravity will have the same effect on any object regardless of weight. Drag will counter the effect of gravity though (a feather and a hunk of lead won't fall at the same rate due to air resistance or drag). Also, drag slowing an arrow down horizontally should have an effect (slowing the arrow down allowing gravity to drop it further in a given distance because it took longer to get there). The weight of the arrow does come into play only because a heavier arrow will lower the speed also allowing the force of gravity to drop it further at a given distance. A million things (type of vanes, weight of arrow, arrow spine affecting flight, nocks, peeps, and assorted stuff on the string, etc.) can affect how far an arrow drops in a given distance. I was just curious what the average drop is for some folks who visit this forum. Maybe some tinkering is in order to try to get a flatter shooting rig...