I'm not sure about foc but I am going to try a couple I tuned any input on these? shaft is 30.5 from the deepest part of the nock to the end of the 5575 gold tip 100gr insert 200gr point bow is 51@28 northern mist whisper total arrow weight is about 620gr

Thanks Mike

How does the arrow tune to the bow? Your sitting just a hair over 12gpp with that setup currently.

Well tuned is the key, my guess is 20-22% foc and hit like a sledge hammer.

Useful tool posted by Rob, just need to find the balance point and plug in numbers.

http://tradgang.com/noncgi/ultimatebb.php?ubb=get_topic;f=2;t=000089#000000

Thank you for the reply. They bare shaft good and they seem to hit hard. I'm new to the foc game but from what I read it seems to be worth looking into