ORIGINAL: Arthur P
"Arrow Drop" is absolutely the most useless piece of info an archer can clutter his mind with. All that does is tell you how much an arrow traveling XXX fps will fall, over XX number of yards, when shot perfectly level off a cliff. Who ever does that? Not I!
The archer launches his arrow at an upward angle, the arrow travels upward until gravity begins pulling it down and it starts to glide downward until itplops into the center of the target. That upward launch angle makes arrow drop numbers totally, completely, irrevocablymoot.
Unlessssss you anchor at the corner of your eye 
One tip I'm trying to make with this post is that you should be shooting a comfortable poundage and adequate arrow out of your bow making you a better more accurate shooter rather than pulling poundage you might be strugglin with or an arrow underspined for your bow trying to get the magic speed or a few fps more that really means nothing other than perhaps KE....but you first have to be accurate and hit what your aiming for rather than hope you make up for errors with speed....what good is a fast bow if you struggle with it or can't hit what your aiming for because your shaking on an over poundaged bow. Or, your arrow is too light for penetration because it absorbs too much of the impact....heavier is always better.
And that folks is the end of story 
Well done Rob