ButchA

Good evening guys...

I was just reading an internet article about arrows, FOC, and the kinetic energy.

I got curious and took one of my Beman ICS Hunter 340's and found the balance point on a nail(took me a bunch of tries, but I got it balanced!) Then I measured from that balance point to the inside of the nock. Then according to the internet site, I used this mathmatical calculation:

18 7/16" balance point (converted to decimal - 18.4375)
29" Beman ICS arrow

18.4375 / 29 - .50 X 100

My current FOC with a Beman ICS Hunter 340 arrow and a 125 grain tip came out to be: 13.57!

Isn't that just a tad heavy for an arrows FOC? I am curious about dropping down to 100 grain tips. With a 67# bow @ 29" draw shooting Beman ICS Hunter carbon arrows at 29" length, I could try 100 grain tips right? They might give me a touch more speed is all though. What do you think?

Rob/PA Bowyer

I wouldn't call that a tad heavy, just the opposite, sounds like a great setup....dropping to 100 grain heads won't pick up that much speed, not enough to be relavant. Isn't the least FOC one would want is 10%....your in great shape.

ButchA

Thanks, Rob... [8D]

My Beman ICS 340's are 9.3 grains/inch so the shaft weighs 270grains. Add in the fletchings, nock, adapter, and tip, and I'm shooting roughly a 440 grain arrow out of a 67# bow with a 29" draw length. I guess the 125 grain tips are the best for the setup.

ijimmy

If you are accurate with them I would not worry , foc is overrated as a whole . The one drawback I have noticed with a big foc number is your arrow trajectory starts looking like a rainbow when your arrows are very "nose heavy" . Again if you shoot fine at the distances you are comfortable with I would change nothing , better to be concerned with the monkey behind the string , and get yourself intune , you are the most critical part of the equasion .

Navajo

FOC is a topic that gets much debate! In my honest opinion a FOC in the range of 9-14 will serve most archers well!!