FOC

[Sloppy Does]

Anyone think an foc of 20% is too much for a micro out to fifty yards? Another question, if two arrows weigh the same but one has an FOC of 20% and one with an FOC of 14% would the 20% arrow drop off faster even though they weigh the same?

[SEW]

No, yes.

20% ok if fixed broad head. Expandible needs less and fp even less.
The more the FOC, the faster it will drop at longer range, such as 50 yds+. Maybe less.
Don't use more FOC than needed. Nor less.

[bubba]

With that said coming from Sew! You can take it to the bank.. Hes got that broad head down............

[Sloppy Does]

SEW, I hunt with rage bh's. How much extra drop we talking with 20% up to 50 yards, minor or a lot? Does anyone know the FOC of a stock quill?

[awshucks]

Can't help on your questions, but I've come to classify FOC in three steps.

Under 10% is low, 10-15% is medium and all above 15% is high. FOC will help a weakly built arrow shoot better, in most cases.........

I think i'm at or around 18% last I checked, fwiw.......

Listen to SEW...........

[galamb]

I shoot slow (Vix II - 272 @ the muzzle),

I shoot heavy for that bow (almost 400 grains - 325 minimum),

I use 4" vanes,

I shoot 100 grain mechanicals (currently Axe, Battle Axe's), and

I shoot "extreme" FOC > 22% (210 grains - broadhead/insert, is at the "business end").

While working up my set-up I noted a 5-6" "drop" at 25 yards between a 14% and 22% FOC, all else being equal (within 10 grains) at that speed.

More speed will result in less drop, all else being equal.

I have ruined many arrows putting them on top of each other on the target.

I shoot that FOC because after more than 2000 shots using off the shelf and self-built bolt that's where I got the tightest, most consistent groups that were least effected by varying winds out to 35 yards.

It works for me, others experience may be different.

[SEW]

To help answer some:
The shorter the arrow, the more Foc needed.
The more drag(serious helical) at the nock end of the arrow, the more FOC needed.
20% FOC for a 16" arrow may well be needed for most situations.
Since expandibles are virtually the only style I shoot, I can get by with somewhat less FOC than some others use.
Out to 50 yds, I don't think (but don't know for sure) that more FOC would be seriously detrimental trajectory-wise. From 50-100 yds, it really makes a difference.
I do all arrow testing for groups in very low wind at 80 yds. I shoot to 100 yds.
For most Expandibles , I've found 4 degree offset to be more accurate than helical . Not so with fixed broad heads - the reverse is true.
Hope some of this helps.

[Sloppy Does]

What Im considering is 16 BE executioners off set blazers aluminum nock and a 92gr insert with a 100 grain rage. ( arrow weight 374 50 with an foc of 20 45% ) if my calculations are right. This is the same set up I use with my 380 except for the length was 20". It work great out of the 380 but going to 16" I was wondering if I should do something different for the micro because I don't want more drop than necessary since Im going down from a 380 to a 335 bow. Im not a speed freak just looking for the right combo before I spend money.

[SEW]

I think you'll be just fine with that set-up. Wouldn't want any less FOC.

[Sloppy Does]

Thanks for the advice!

[Limbs and Sticks]

All ready been said, knowing how to build a arrow correctly is 75% of it to me, I shoot between 10 and 15% foc with 20 series alum arrows and have no problems with most bh's

Wes