Ideal FOC?

Crossbow Hunting

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va3cgt
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Ideal FOC?

Post by va3cgt » Sun Jan 31, 2016 8:59 am

What is the ideal FOC for a arrow? Does it stay the same regardless of shaft length?

LongCarbine
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Re: Ideal FOC?

Post by LongCarbine » Sun Jan 31, 2016 9:17 am

I like mine very front heavy 24-25% .That"s just me . I do get a lot of drop pass 40 yards but that's ok because I don't like shooting deer any father than that. And yes arrow length makes a difference. 200 grains up front with 20" arrow will have a different f.o.c % than an 18"
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Normous
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Re: Ideal FOC?

Post by Normous » Sun Jan 31, 2016 11:06 am

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vixenmaster
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Re: Ideal FOC?

Post by vixenmaster » Sun Jan 31, 2016 1:43 pm

I can tell this subject is diff fer everyone, not many actually use the exact same weight/arrow combo. Some of my set-up's run 14%-17%. Others abit less n some knockin 40% or abit more. I have several diff crossbows wid diff weight/length n type of arrows. I have some areas i hunt on my lease that 75 yds will give me some great deer movement. I use a fast 380-425gr arrow combo. I have some stands that 40 yds is the max n i run 40% set-up from one of my crossbows n bust shoulders
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Cossack
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Re: Ideal FOC?

Post by Cossack » Sun Jan 31, 2016 5:52 pm

Depends on several things such as size of head you use as well as vanes. Using relatively small vanes (2" Blazers, and 3" Bohning X vanes) and mechanical heads or low profile (short) fixed 4 bladed heads I like my FOC around 15-18%. If I were using larger 2 sided fixed heads, and bigger vanes as a result, 12 to 15% would suffice. IMO, while crossbow arrows call for a higher FOC than verts, I like the lowest FOC that enables my arrow to fly accurately. Why? Higher than necessary FOC decreases the arrows ballistic coefficient -important to how it glides- thereby causes a steeper trajectory, which in turn requires more precise ranging and aiming.
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Limbs and Sticks
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Re: Ideal FOC?

Post by Limbs and Sticks » Mon Feb 01, 2016 10:45 am

Between 10/15% is all that's needed if the arrow is built correctly.
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SEW
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Re: Ideal FOC?

Post by SEW » Mon Feb 01, 2016 7:29 pm

My experience:
1) the shorter the arrow, the more FOC required
2) the more the drag on the rear of the arrow(helical vs offset, larger vs smaller fletching) the more FOC needed.
3) the farther the range, the more FOC needed. Ie, what stabilizes an arrow just adequately to 40 yards will likely nor work at longer ranges. The farther you want to shoot, the more FOC you'll need.
4) more FOC (and more steering control - more offset or helical) will be needed as the point has more steering. Least - field point; low medium - low drag expandible - FOC, Shwacker, etc; medium - busy front end of expandible, ex Spitfire, low profile fixed BH - ex - Boltcutter, Slick Trick; high profile (large) broadhead.
5) more FOC than needed just causes a faster drop
6) ideally use no more FOC than needed to get good grouping at the max range desired.
7) there is no simple answer as to "what is the best FOC ". It's a lot more complicated than that. Arrow length, fletching type, fletching configuration, type of point, max range desired all factor in to the answer.

Normous
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Re: Ideal FOC?

Post by Normous » Tue Feb 02, 2016 7:38 pm

^^ Well said.
EXCALFFLICTION 1991 ->>---------> 2019
Kustom Krug Micro 355, Matrix 355 and NEMESIS
Leupold VX-R 2-7, Trijicon SRO Optics
Boo Strings
SWAT BH's
Teach Your Family How To Hunt So You Don't Have To Hunt For Your Family
Nature Is My Nurse

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