Aluminium and high foc? 2015-08-28T15:29:00+00:00

Home Forums Friends of FOC Aluminium and high foc?

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  • mfc
    Member
    Post count: 14
    #4694 |

    hi all,

    I recall( but can’t locate) a comment regarding heavy foc alloys being very hard to tune ( as you article on efoc I beleave) . Is it workable to use them on a lighter weight bow 45# to get a 650 ish arrow with high to ext foc ? Or is it only an issue when building sharp fence posts to stick buffalo with?..

    Most likely targets here arm and with this weight bow are feral pigs and heavily fleeced goats fallow deer size game

    Regards mark

    Ps loving the magazine, to much bs in the compound world , you’d think it was a mixed martial arts contest!!!

    Regards mark

  • Stephen Graf
    Member
    Post count: 2100

    Extreme FOC arrows are not hard to tune, no matter what they are made of. In fact, one of the reasons to make an EFOC arrow is to make it easier to tune.

    The trick is to get a shaft that is stiff enough to support the heavy point, while being light enough not to require too much weight up front to get the EFOC effect.

    The nice thing about carbons is that you can get arrows down in the 7 or 8 grain per inch range. Which makes it easier to achieve EFOC. Aluminum arrows may be more in the 10 grain per inch range, which makes it harder to get enough weight up front to achieve EFOC.

    The most important factor to achieve maximum penetration is total arrow weight. Moving the weight to the front gives you a more efficient, flatter shooting, and still better penetrating arrow.

    If you are free to do whatever you want, then the thing to do is go with the lightest stiffest arrow you can get. This means carbon.

    If you are constrained to use aluminum, then the most important thing is to achieve good arrow flight while getting as heavy an arrow as you can with the most FOC you can get. But be resigned to the fact that you probably won’t get a lot of FOC with aluminum, unless you are willing to shoot a 1000 grain arrow. A really heavy arrow is probably impractical with a 45# bow.

    A good broadhead is also important. Ashby’s studies have shown that a two blade single bevel broadhead gives the best overall performance. For sheep and goats, it probably doesn’t matter. but pigs are tough, so using the best broadhead on them is important.

  • mfc
    Member
    Post count: 14

    I’m not constrained to alloys , just in a cash drought..also we can’t hunt sambar deer here with a bow under 50# so I have to up my strength and buy new limbs…so $50 au for game getters versus 110 odd for gold tip carbons .

    I’ve got some 100 grain gamegetter brass inserts and I’m changing from 125 single bevel out backs to 145 outback trad’s ( 140g ) and a heavy adapter…

    I recon I can get to around the 650!g line and into the low 20 percent range, far from a heavy efoc arrow but for a 45# bow it is better than you’re normal light n fast crews arrows

    The 99 dollar question is can I get them to tune up nicely lol

    Cheers mark

  • wojo14
    Member
    Post count: 325

    I too enjoy shooting aluminum. They are a bit different tho. Hitting a target weight is easy as aluminum shafts weight more in thr gpi dept. Efoc is a little different.

    I found that aluminum arrows fly their best at 18-20%foc. Which IMO is just fine.

    If you are shooting 45# at your draw recurve (which I am curently)

    Try one of the following set ups.

    2018 with 200 point

    2114 with 200 point(my current set up)

    2115 with 250 point

    I play with arrows a lot. PM me if you have anymore ?’s8)

  • David CoulterDavid Coulter
    Member
    Post count: 1971

    I haven’t shot aluminum for a few years now. I went to carbon because in my opinion they are actually cheaper than aluminum. When I could get old lots and used shafts for little money on the auction it was fine, but then the prices started climbing. I was going through shafts pretty regular, getting banged up stumping and running into one another target shooting. I’m using Beman ICS Bowhunters, which are only a few bucks more than aluminum and way more durable. These shafts were very easy to tune. I’ve built them up so my stumpers, target and hunters are all close to the same. I just weighed a brodhead tipped at 635 gr, a target at 625 and a stumper at 650. The hunters come in just shy of 29% FOC. On the stumper I have aluminum collars fore and aft, plus copious amounts of hot glue. With this set-up they hold up really well. I might break one about 4 inches back from the head now and then when I bounce it off the side of a sapling, but I only have to build about four stumpers a year. Overall, I’d say they’re a good deal. thanks, dwc

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