Now for the confusing part,for whatever reason,there are manufactuers out there that do not list their arrows by spine,such as the PSE arrows and carbon Express.Their numbers are arbitrary and have no correlation to spine and they have the higher number as the stiffer shaft.You have to look up what the actuall deflection is.
With the shafts that are labeled 55/65 or such,they are not always accurate numbers.A 30" draw at 60# can not use the same spine as a 24" draw at 60#.
Your best bet(without the software) is to look at an Easton chart and reference the spine needed,then cross reference to another brand,once you have figured out what their shafts spine at.OR, avoid the confusion and just use an Easton shaft,which are top of the line anyway.
