Teach me FOC
03-11-2008, 06:43 AM
#11
Nontypical Buck
Join Date: Aug 2006
Location: Southern MD
Posts: 2,520
RE: Teach me FOC
I don't know if it is my imagination or if I actually read this (I've read so much it runs together at times) but for some reason I thought that a preferred FOC for target arrows was around 10%.
03-11-2008, 06:46 AM
#12
Join Date: Feb 2003
Location: Howard PA USA
Posts: 2,221
RE: Teach me FOC
Oh by the way the arrows I beat Rob with 2 weeks ago had an FOC of about 21-22%. 221grns on the front of those arrows. 145grn pt, 31grn insert, and an additional 45 grains of additional weight on the back of the insert.
Oh and 9% is deffintily better than .98% LOL[8D]
Oh and 9% is deffintily better than .98% LOL[8D]
03-11-2008, 07:32 AM
#13
Giant Nontypical
Join Date: Feb 2003
Location:
Posts: 7,571
RE: Teach me FOC
Jeff, I went to a high FOC setup last year and was amazed at how hard my arrows hit, and actually to me I got better arrow flight.
03-11-2008, 07:37 AM
#14
Nontypical Buck
Join Date: May 2004
Location: Albany, NY
Posts: 4,679
RE: Teach me FOC
At the risk of going against the grain here, I've never worried about FOC unless I was building an arrow for Field Archery (out to 80 yards),FITA (out to 90 meters), or if I were building a hunting arrow with a fixed blade head. I do feel that FOC has it'sbenefits when your shaft will likely see windy conditions on long shots, and also when you have a broadhead on the arrow, but otherwise I don't worry about it too much.
My current arrows are just short of 9% FOC and when I'm on I'll wreck at least a couple pin nocks per practice session at 50 yards. In a 50 arrow practice session at this distance I'll miss a 5" spot maybe 2-3 times.
My current arrows are just short of 9% FOC and when I'm on I'll wreck at least a couple pin nocks per practice session at 50 yards. In a 50 arrow practice session at this distance I'll miss a 5" spot maybe 2-3 times.
03-11-2008, 08:10 AM
#16
Giant Nontypical
Join Date: Feb 2003
Posts: 5,716
RE: Teach me FOC
Jeff - I've been toying around with this year's arrow setup... Glad you posted this.
Right now,my hunting arrow (290 gr.)comes in at 10.7%, 340-350 fps, 77# KE- but I'm gonna try to improve it for next year. Mybow draws29", and it's currentlypeaking at69#, which is 4.2 gpp.
If I just go to a lighter pin nock system and Rayzr Feathers, and bump my head weight up to 100 - I can stillkeep my hunting arrow weight around 290 and be at 14.5%. Speeds shouldstay in the 340's, KE stays the same,but I pick up some "free" FOC, just by moving some weight around.
If I did a 125 grain head on that arrow, I'd be hunting with a 320 grain arrow, which is 4.6 gpp, but my FOC would fall at just a smidge over 17%. That would slow me down, but the numbers would look great. Even if my speed came inaround 330'ish-it would still generate between 75and 80# KE.
I agree with Matt - it's really no big deal unless you plan on shooting really long range. I don't shoot very far, but I'm just tinkering around, trying to squeeze the best numbers out of my arrows as possible - andsee how it translates into "real world" performance.
Right now,my hunting arrow (290 gr.)comes in at 10.7%, 340-350 fps, 77# KE- but I'm gonna try to improve it for next year. Mybow draws29", and it's currentlypeaking at69#, which is 4.2 gpp.
If I just go to a lighter pin nock system and Rayzr Feathers, and bump my head weight up to 100 - I can stillkeep my hunting arrow weight around 290 and be at 14.5%. Speeds shouldstay in the 340's, KE stays the same,but I pick up some "free" FOC, just by moving some weight around.
If I did a 125 grain head on that arrow, I'd be hunting with a 320 grain arrow, which is 4.6 gpp, but my FOC would fall at just a smidge over 17%. That would slow me down, but the numbers would look great. Even if my speed came inaround 330'ish-it would still generate between 75and 80# KE.
I agree with Matt - it's really no big deal unless you plan on shooting really long range. I don't shoot very far, but I'm just tinkering around, trying to squeeze the best numbers out of my arrows as possible - andsee how it translates into "real world" performance.
03-11-2008, 08:53 AM
#17
Nontypical Buck
Join Date: Jan 2008
Location:
Posts: 2,139
RE: Teach me FOC
ORIGINAL: PA Hardwoods
Jeff, I went to a high FOC setup last year and was amazed at how hard my arrows hit, and actually to me I got better arrow flight. My arrows had an FOC of almost 22%. You honestly only see the benefits of the high FOC setup once you get to about 19% FOC. Trust me you can hear the difference when your arrow hits. It really packs a punch. The person to talk to about high FOC arrows is Aussieguy, he's the one who got me onto them.
Gold Tip has a FOC calculator on their site and you may want to go read the reports by Dr. Ed Ashby. They can be found on the Tradgang website. He does some great reports on broadheads and high FOC setups.
Jeff, I went to a high FOC setup last year and was amazed at how hard my arrows hit, and actually to me I got better arrow flight. My arrows had an FOC of almost 22%. You honestly only see the benefits of the high FOC setup once you get to about 19% FOC. Trust me you can hear the difference when your arrow hits. It really packs a punch. The person to talk to about high FOC arrows is Aussieguy, he's the one who got me onto them.
Gold Tip has a FOC calculator on their site and you may want to go read the reports by Dr. Ed Ashby. They can be found on the Tradgang website. He does some great reports on broadheads and high FOC setups.
03-11-2008, 08:59 AM
#18
Join Date: Feb 2003
Location: Howard PA USA
Posts: 2,221
RE: Teach me FOC
ORIGINAL: magicman54494
PA, when you start shooting those high foc arrows does spline become an issue?
ORIGINAL: PA Hardwoods
Jeff, I went to a high FOC setup last year and was amazed at how hard my arrows hit, and actually to me I got better arrow flight. My arrows had an FOC of almost 22%. You honestly only see the benefits of the high FOC setup once you get to about 19% FOC. Trust me you can hear the difference when your arrow hits. It really packs a punch. The person to talk to about high FOC arrows is Aussieguy, he's the one who got me onto them.
Gold Tip has a FOC calculator on their site and you may want to go read the reports by Dr. Ed Ashby. They can be found on the Tradgang website. He does some great reports on broadheads and high FOC setups.
Jeff, I went to a high FOC setup last year and was amazed at how hard my arrows hit, and actually to me I got better arrow flight. My arrows had an FOC of almost 22%. You honestly only see the benefits of the high FOC setup once you get to about 19% FOC. Trust me you can hear the difference when your arrow hits. It really packs a punch. The person to talk to about high FOC arrows is Aussieguy, he's the one who got me onto them.
Gold Tip has a FOC calculator on their site and you may want to go read the reports by Dr. Ed Ashby. They can be found on the Tradgang website. He does some great reports on broadheads and high FOC setups.
03-11-2008, 09:04 AM
#19
Giant Nontypical
Join Date: Feb 2004
Location: Pittsburgh, PA
Posts: 7,208
RE: Teach me FOC
This is just my not so expert opinion based on what I read.
IMO for modern compounds(with decent amounts of KE)shooting deer and just regular competitive target shooting....it's not that much an issue as long as you stay in the generally accepted ranges. 8-15%
A .89% FOC blows my mind and is almost to the point of having the back end swap with the front. Not good.
Now for lower KE setups and especially trad gear, it really seems to boost performance according to the studies. Without ever knowing anything about FOC, my compound hunting setups ended up in the 12-13% range. My setup for my trad bow is around 18%. My front end weight was just more to get the total arrow weight up, I let the FOC fall where it may.
IMO for modern compounds(with decent amounts of KE)shooting deer and just regular competitive target shooting....it's not that much an issue as long as you stay in the generally accepted ranges. 8-15%
A .89% FOC blows my mind and is almost to the point of having the back end swap with the front. Not good.
Now for lower KE setups and especially trad gear, it really seems to boost performance according to the studies. Without ever knowing anything about FOC, my compound hunting setups ended up in the 12-13% range. My setup for my trad bow is around 18%. My front end weight was just more to get the total arrow weight up, I let the FOC fall where it may.
