ORIGINAL: MDBUCKHUNTER
IMO a FOC that is over 15% is a waste of resources. At that point, you start to lose a ton of speed. By losing speed, then you lose your longer distance shooting. You increase your #'s of pins and then have to become more accurate in judging distances.
A LOT of people on this site are going to argue you on that point, I hope you know that
. We have had a lot of debate on FOC and arrow weight lately.
Keep in mind that the proper arrow length being 1 inch past the contact point on your rest is based on you having the rest in the proper location to begin with. Which is right above your grip. Many of the newer rests are not designed this way and have a slight overdraw to them. Like the WB rests and many of the drop a way rests. This would give you an arrow that could be up to an inch too short or more in some cases.
AMO arrow length would be 3/4 of an less than your draw length.
It really doesn't matter what length arrow you shoot though, as long as the spine is correct. I shoot longer arrows than I need, because I like a certain arrow and that is the length I need to get the spine correct for my set up. I have also shot 21 inch arrows before out of my target bow. They shot just fine.
Paul