click on this link and if you know your arrows total wght than only fill down to the red...can't believe how accurate this thing is...if nothing else..it's fun to mess with.bucklemke.com/ke/ke.php
Good chart and would get you in the ball park, but one draw back is the assumetion that bow company advertise true IBO speeds. Company are getting better at it, but I still use a cronograph to get true speed. The placement of spped nock on the string can change your fps as much as 5 to 6 fps alone. Good tool to use, but for true speed use a cronograph. I have heard people tell me their bow shoot some many fps, and I ask how do you know and they normal come back with the IBO is etc... So I pul out my cronograph and find the true speed and it is normally slower by about 10fps on average. :doh:
Yeah i know...one of my hunting bows Chrono's at 264fps.....and that chart is within +5...still neet to use and just depends on how picky one is or if they just want to argue the point.
I must of done something wrong. my bow is shooting 314 with a 421 gr arrow according to the chart. but the crono I shot through said 310. but it is close.
That is close.I posted the link incase someone wanted to play arround....but it is fairly accurate though.
This is pretty accurate. It hit my hinting bow on the nose according to the crono that I used which is 293. My target bow it was 2 fps high it shows 301 and the crono shows 299. Mo.Hick
Calculated at 288. Through my chrono 286, 286, 287. (Last time I checked) My chrono must be right-on also.:wave: On second thought, maybe not.
My trykon shoots 280 through the chrono and I just guesstimated string weight at 15 grains and the calculator came up with 279......:rockon: seems good to me, thanks for the link now its in my favs!
Like i said...just something to play around with.Helps though if you don't have access to a chrono....gives ya an idea.one of my bows it showed 268 but i've chrono'ed it at 263....i may be off on total wght of string items that i gave.
