At 10 yards and closer use your 40 yard pin.
I know it doesn't seem logical. Just do it.
Not if you wanna hit your mark.
What a lot of people don't realize is.....the arrow is launched above the line of sight, at release. At a few yds out from the bow (most times it's around 5-8yds) the lines meet. Then, the arrow flies above the line until it arcs back down to again hit your mark (in an example of a 20yd pin) @ 20yds.
Here's a crude diagram I made up a few years ago, now....
