I would like to hear some results with 20%+ FOC's ^^^^^^^

[cmeier117]

I'm shooting a kinetic 300. 50 grain brass insert and 125 grain head. Out of a 70 lb bow. Shoots good. FOC held in accuracy but there is a point when you can have too much I think

What length do you have your arrows cut at?

 

[vcb]

We are all gear heads on this site. My wife tells me that I have all this "stuff" in my hunting storage..."stuff"? Every single piece of gear in there is important and I need it all!! If she needs more room she would have better luck clearing out some of her shoes from the walk in closet!

 

[Rick Leathley]

We are all gear heads on this site. My wife tells me that I have all this "stuff" in my hunting storage..."stuff"? Every single piece of gear in there is important and I need it all!! If she needs more room she would have better luck clearing out some of her shoes from the walk in closet!

My wife and I got in a huge argument about why my western Mountaineering sleeping bag can't be stored in the garage....

 

[ontarget7]

Just a quick update with tuning these shafts. I find with the 200 grains up front it definitely likes more of a supporting rest. I had a Limbdriver on the S30 and it was tuning fine with bareshaft and fletched at short range but I put the QAD HDX on and noticed I would get a slight tail low tear and this also shows up with a tail low bareshaft at 12-15 yards. I am anal when it comes to true flight and prefer the QAD so not sure how the heavy FOC is going to play out. I will keep you posted as I dive into this a little more.

 

[vcb]

Thanks 7, I am learning about extreme foc through this thread

 

[ontarget7]

OK guys, so far I see no huge advantage from an accuracy standpoint and that is what I am really looking for. Like I mentioned in a previous post the more weight you have up front it will require more of a supporting limb driven style rest to get the best optimal tune. The very extreme FOC in the 20% range does seem to give tighter groups with broadheads when you are not quite right in your tune. However when everything is equal I see zero difference with my broadhead groups. For the long range shooting I feel the micro diameter arrows are more of an advantage in long range groups over those of standard size with heavy FOC.

To sum it up, I feel it really comes down to the right dynamic spine for the best overall groups regardless what FOC you intend to shoot. I can think of 3 different set ups that performed the best for me off the top of my head. One was a 10%, another at 12% and the last was a 16%. The one thing these 3 set ups had in common were the same dynamic spine range on the OT2 program, referring to where they landed on the programs graph while in the hunting option for spine. This was not dead center of their chart and slightly to the weak side.

I will have to do some more testing with the 20% but this has been my findings so far.

 

[Lukem]

When selecting an arrow, do you typically try to go a little stiff, a little weak just the general ballpark of correct spine on OT2? What are your thoughts on the hunting vs target selection?

I have 4 of my arrows built that should put me at about 17% if I remember right. Got them set within a couple thousandths on spine as well. Haven't had a chance to do any tuning and shooting yet, been a busy spring.

 

[Danielboone]

I still believe that any benefits you get from increased FOC is really more from the increase in total arrow weight as long as the FOC is over 8-9%. Bows become more eficient with a heavier arrow and momentum increases, both of which cause increased penetration as well as better stability in a crosswind, etc.

 

[ontarget7]

When selecting an arrow, do you typically try to go a little stiff, a little weak just the general ballpark of correct spine on OT2? What are your thoughts on the hunting vs target selection?

I have 4 of my arrows built that should put me at about 17% if I remember right. Got them set within a couple thousandths on spine as well. Haven't had a chance to do any tuning and shooting yet, been a busy spring.

If you where to select the both category for the spine filter they would hit dead center. When selecting the broadhead filter they are just outside the green in the yellow. This would recommend making modifications to get you in the green but I have found very good success right there

 

[ontarget7]

I still believe that any benefits you get from increased FOC is really more from the increase in total arrow weight as long as the FOC is over 8-9%. Bows become more eficient with a heavier arrow and momentum increases, both of which cause increased penetration as well as better stability in a crosswind, etc.

From my testing the best results in a crosswind come from micro diameter shafts with a 6* helical. Penetration comes from shot placement and is achieved with accuracy. This is the reason my primary focus is always accuracy.

 

[Danielboone]

From my testing the best results in a crosswind come from micro diameter shafts with a 6* helical. Penetration comes from shot placement and is achieved with accuracy. This is the reason my primary focus is always accuracy.

I would not dispute that at all. Accuracy and a well tuned bow are key. Animals move however, especially at longer distances out west and sometimes things happen that are out of your control no matter what you do to minimize them.

 

[Jacob Chapman]

I shoot a Tall Tines recurve, 57# @ 29". Gold Tip XT Hunter 7595's (10.2 gpi) full length, 100 gr brass insert, 50 gr insert weight with 175 gr heads and 3 4" feathers. over 24% FOC hits very hard, super quiet. 715 gr total if I remember correctly. My only focus is hunting, I do shoot 3D in the summers but that is solely for hunting practice. I think some would be better off going to a heavier arrow in their compounds, I know my z7 liked the FMJ's-would have been real lethal with some heavier heads.

 

[Trumpkin The Dwarf]

Traditional archer here,so ignore me if you wish.
I like high FOC for the added penetration I get. Given that 180 fps is blazing fast in my world, I don't worry about speed and I shoot 700+ grain arrows for the added momentum (which really increases the penetration of said arrows). I don't know how much FOC affects group size, but it DOES have a large (good) influence on wind drift, at least in my experience.

Sorry if this seems like a hijack of the thread, I really just wanted to point out that high FOC helped a lot with wind drift. Something to consider on those long shots.