OK Tech heads, on Chronographing.
First off I'll say this as many newbies or those looking to learn might pick up a bit of advice.
My Allegiance is a 70 lb bow. Recently I chrono'd it an noticed it was slower than it once was and I know why. The cables/string has creeped. I checked ATA and sure enough plus I put it on the bow scale and it's down 4 lbs. Instead of a 70 lb bow it's maxed out at 66 lbs. I'm about ready to make a set of new cables and a string but want my 82nd to arrive first. I may just twist up the cables to get the 4lbs back and put the bow back into spec.
So while Brian (BPBowhunter) was up today for me to install his Gibblet string and cable, we played around with all my bows and his shooting and chrono'ing.
My bow, now at 66 lbs chronos in at 298-300 fps. Thing is, when Brian shot it, he was hitting 304-305 fps.
Riddle me this, why would he get 4-7 fps faster than I would shooting the same exact bow? The only difference between us is he is a 30" draw and I'm a 28.5" draw and the bow is set at 28.5"s.