After I get my bow all tuned up the first thing I do is break out my chrony and see what my arrow is doing. I am not truly worried about the speed though, I do it for the following reasons.....

1.) Knowing my KE allows me to examine the different types of broadheads to use. I am a fixed blade fan but I like knowing that I have 78 # of KE and that if I want to use a mechanical with a 2 3/4"cut I will have plenty of oomph behind my arrow.

2.) I personally won't hunt with a bow below 280 fps. With a 406 grain arrow my bow is shooting @ 295 fps. Knowing this tells me that I have about 45 grains to spare before I hit the 280 fps mark so I can tinker and toy and see how different weight arrows tune with my set up, see where my FOC goes, where my KE & momentum goes, etc.