I dont know if my math is correct on this but heres my setup this year and want to know what my FOC is. Easton FMJ's HIT 11.3 GPI cut at 29" if I remember correctly. 125 gr muzzy's 2 in blazer vanes I used 11 gr for the nock and insert and 5 gr for each vane? Arrow weighs in at 327.7 gr + 125 + 15 + 22= 489.7 total gr I guessed on how to figure FOC. I divided 26 (fletchings+nock) by 136 (BH+insert)= .1911 or 19% Did I do this correctly? Does this sound like a good setup for elk as I plan on using this setup on elk if I can make the trip happen next year and maybe a hog hunt this winter? Thanks in advance. This is the first time Ive played with my arrows and want to make sure I did it right and if not how to do the math correctly next time!!!
with those numbers foc is at around 11% which is good ke is around 70 ft/lbs (this is assuming your draw weight is 60# and draw length is 29) or 81 ft/lbs (this is assuming your draw weight is 70# and draw length is 29) velocity is at 255 to 275 fps depending on draw weight and length this setup will take anything you want to hunt in my opinion- those fmjs are like driving a damn tank through the animal- with all that i have learned on here weight trumps speed in my book any day
Im shooting a mission ballistic at 70# and 28.5". I am not looking for speed. I want a nice heavy arrow that will get the job done. Thanks for your help Sent from my SCH-R970 using Tapatalk 4
You nailed it. Your bow is the one that is made for the speed...your arrow should not provide the same.
The way you did the foc calculation I am unfamiliar with, I am fairly confident that you measure the length of the from the tip of the arrow to the middle of the nock. Then, you balance the arrow atop a falcrom and mark where it balances. You then measure where the arrow is in perfect balance from the nock to the mark. divide that number by the overall length. and subtract .5 and multiply by 100. The method you used might be be a little off because of how leverage works. here is a link to help guide you. Arrow FOC Basics and How to Calculate FOC
You are correct. I realized this after the fact. Its closer to 11 or 12. Sent from my SCH-R970 using Tapatalk 4
go to stevesarcheryarrow.com he has lots of info on that kind of stuff. good job on wanting to know your foc, too many people overlook it
