Broadheads and FOC

[Jamesl]

Ok, here is my arrow set up. 29" (tip of broadhead to end of nock), it balanced at 17" and the total length of the arrow is 29". Using the foc equation.

[(ABP ÷ TAL) - .50] x100 = FOC. I came up with an foc of 8.62 percent. First does this seem correct?

My broadheads and field pt do not group together. Right now I am sighted in with my broadheads (exodus 100gr and hellrazor 100gr. I am hitting paper plates out to 60 yds consistently. But I would like my field pt and broadheads to shoot the same. Do you guys/gals think increasing my foc would help? What would be the best way. Btw, I could probably add another inch to my arrow as the broadhead is over the shelf at full draw. The bow's timing is good.

Hoyt carbon 34
67.5 lbs
29" DL
Easton Axis 340's

Also, I have an elk hunt in 10 days.

Thanks in advance.

[muddyfuzzy]

If the bow is in spec and the cams are running well to one another then is some small tuning gremlin, yokes more than likely. Your set-up is tuneable and should group for you. Increasing FOC will make your arrow more forgiving, especially at greater distances. I wouldn't reinvent the wheel less than two weeks out with your arrows. There are a ton of folks shooting arrow set-ups similar to your with no problem. I'd really like to see the lean up top @ full draw.

[Jamesl]

If the bow is in spec and the cams are running well to one another then is some small tuning gremlin, yokes more than likely. Your set-up is tuneable and should group for you. Increasing FOC will make your arrow more forgiving, especially at greater distances. I wouldn't reinvent the wheel less than two weeks out with your arrows. There are a ton of folks shooting arrow set-ups similar to your with no problem. I'd really like to see the lean up top @ full draw.

I will check it tomorrow at the bow shop.

[BigL]

I wouldn't do much with the setup this close unless you have time to get everything back sighted in. If the bowshop tomorrow can make adjustments there and you resight in then I probably would. You might want to try a 125 grain head on it and just resight with it for a quick change to increase FOC if you want a little more punch to the arrow especially at longer distances.

If you don't have time to spend with it, sight in with broadheads and go hunt.

Good luck on the hunt.

[Jamesl]

I wouldn't do much with the setup this close unless you have time to get everything back sighted in. If the bowshop tomorrow can make adjustments there and you resight in then I probably would. You might want to try a 125 grain head on it and just resight with it for a quick change to increase FOC if you want a little more punch to the arrow especially at longer distances.

If you don't have time to spend with it, sight in with broadheads and go hunt.

Good luck on the hunt.

thanks!

[ar3731guy]

sounds more like tuning issues than FOC. the best way for you to increase your FOC is to use brass inserts. i myself use Axis arrows and run a 50 gr brass insert and 125 gr points. im running aroud 480 gr total weight on that setup. my FOC went from 12% to 16% right there. my next arrows i will use 75 gr insert and the same 125 gr point. that should get me up around 18% and total arrow weight will be around 505 gr.

[JW]

I agree with the above stated. I do shoot a heavier FOC set up but some folks get waaaay to wrapped up in it. Get er tuned and make sure your Broadheads are flying straight. That's more important than just about anything.

[Jamesl]

I agree with the too late do anything about it now. I will change up things for next year. I did buy some longer axis 340's today about an inch longer so the broadhead would not be over the shelf. They didn't fly well at 50 yds like the shorter ones do. I'm just going to use the shorter arrows and have to be ok with them being over the shelf at full draw.

Thanks for the advice.

[JW]

I agree with the too late do anything about it now. I will change up things for next year. I did buy some longer axis 340's today about an inch longer so the broadhead would not be over the shelf. They didn't fly well at 50 yds like the shorter ones do. I'm just going to use the shorter arrows and have to be ok with them being over the shelf at full draw.



Thanks for the advice.

Bad thing about an Axis is they have a heavy gpi. You have to add even more weight to get your FOC up vs a normal gpi shaft. That's why I quit shooting em. I can add the same weight up front as I would need to on an Axis and end up with the same weight arrow and an even higher foc.

[Jamesl]

Bad thing about an Axis is they have a heavy gpi. You have to add even more weight to get your FOC up vs a normal gpi shaft. That's why I quit shooting em. I can add the same weight up front as I would need to on an Axis and end up with the same weight arrow and an even higher foc.

I went to the Axis because it was heavier and had a smaller diameter than my previous arrows (carbon maxima's). Not overly happy with the Axis.

[JW]

I went to the Axis because it was heavier and had a smaller diameter than my previous arrows (carbon maxima's). Not overly happy with the Axis.

More choices in a skinny shaft.

But if you're not shooting long range in the wind the skinnys aren't gonna do anything for you. Personally my arrows go deep enough in the dirt after a pass through.