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Old 02-28-2011, 02:28 PM   #1
Rattlinman
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Default Increasing F.O.C ??

I'm wanting to better my f.o.c so I'm thinking of adding about 20 grains to my tip weight.
How much fps will I lose and should it affect my tuning on my rig ?
Just curious if I need to re-paper tune afterward.....
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Old 02-28-2011, 03:12 PM   #2
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Unless you are borderline underspined with your shafts now, you should loose about 7fps and have to make modest elevation adj. of your pins.
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Old 03-01-2011, 09:24 AM   #3
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Most bows will lose 1fps for every 4 to 5 grains added to an arrow. I would not let speed determine my goal to increase FOC.

With a Broadhead I would not accept less than 12% FOC and prefer more. Things I do to get my foc up if need be are using heavier inserts, feather fletch, lighter nocks, no wraps, or as you mentioned go up to a heavier broadhead.

Those are just different things you can do. I don't necessarily do them all on every set of arrows.

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Old 03-02-2011, 08:40 AM   #4
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So I stopped in at the shop last night...here's where it lands.

With a 100 grain tip at 27" arrow length, I'm setting at 8.8% FOC if I did my math correctly.

I added a 20 grain weight to the point, which moved my FOC to 11%.

20 grains is really all I want to add and hold my speed......any thoughts on if 2% is worth the effort to switch everything up ?
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Old 03-02-2011, 08:44 AM   #5
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I definitely think it's worth the effort of adding heavier points. A trick I use when starting arrows from scratch are to use a lighter weight shaft with proper spine. Then that extra weight on the front makes even more difference in a final FOC.

Dan



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Originally Posted by Rattlinman View Post
So I stopped in at the shop last night...here's where it lands.

With a 100 grain tip at 27" arrow length, I'm setting at 8.8% FOC if I did my math correctly.

I added a 20 grain weight to the point, which moved my FOC to 11%.

20 grains is really all I want to add and hold my speed......any thoughts on if 2% is worth the effort to switch everything up ?
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Old 03-02-2011, 08:47 AM   #6
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Well....I'm trying Goldtip Triple X's for 3d this year...so correct spine is really not achievable here. I shot 30X's for the last two years with excellent results....just trying to find that sweet spot with the new logs.
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