I know a few folks frown on chronographs when it comes to wood bows but I personally think they're a fun and useful tool.
Soooooooooo many variables involved in comparing stats. Heck, temperature, humidity, M/C , actually bow weight, type string w/wo silencers, hunting or target setup and many other variables. New bows vs broke-in bows speeds are quite different. Just the different numbers from a set of wood arrows is an eye opener.
For example, I first tested a 40# Osage @24" (FF string) draw with two different arrows. One aspen (24" 5" parabolic cut feathers 377grs) and one cedar (24" 5" shield cut 382gr). Bow is well shot in and I averaged 160 fps. Now with a 28" hunting cedar arrow w/5 1/2" turkey feathers weighing 488gr I averaged 169fps. Same set of arrows but 522 grain cedar arrow, speed averaged 164fps.
So as you can see, actually arrow weight is meaningless unless the arrow likes your bow
. Art B