POC=Port Orford Cedar--that is what folks are referring to when they talk about "cedar" arrows.

BOP=Back Of Point--where you normally measure your arrows to.With wood arrows you have to allow for the taper also (about 1"), so don't chop them off at your draw length.

The spines were measured on a Hill-style longbow as best I can find out, and for a 28" draw length. They require a lighter spine than most any recurve, because are generally slower and cut 1/8" shy of center. There is no chart that will cover every bow, because many shoot differently and are built differently.

You are pulling 55-57#. Add another 5# in spine for each inch over 28", which brings you up to 65-70# spine (you will generally buy wood arrows spined in 5# groups). Add at least 5# for a high performance string material--brings you up to 75-80#. And the Falcon is cut 1/4" to 5/16" past center--this will allow you to shoot an even higher spine than you actually need due to less paradox needed to clear the riser--you might get good arrow flight with arrows spined up to 90#.

These are just basic guidelines, but should get you close. All bows don't follow the rules, how good your release is will make a difference, how well the string is made will also.

Chad