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Thread: Arrow Length..............................

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    Senior Member Speedykills's Avatar
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    Default Arrow Length..............................

    I just bought some new CE pile driver 250 arrows they are 10.4gr I have always cut my arrows at 28.5" from throat of nock to end of insert.
    with that said do to a wrist injury im forced to shoot in the low 40# area and I want to get the most KE out of my arrows for better penetration so I was thinking about using the full length or close to it to get the most weight out of these arrows.Any body else use arrows at full length! I"m also thinking of going from 100 to 125Grn heads,thoughts.

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    I haven't shot full length arrows since.....long time back.

    What would your arrows weigh with 125 gr heads? Do you have a chronograph?
    Former and current Back Yard Champion. I beat myself

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    Senior Member Speedykills's Avatar
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    Quote Originally Posted by Sonny Thomas View Post
    I haven't shot full length arrows since.....long time back.

    What would your arrows weigh with 125 gr heads? Do you have a chronograph?
    using a calculator should come in at about 437grn at 30" I don't have a chrono but I do have a 29"dl should be fast enough also curious about foc these arrows are good from 36-63# draw weight.Ive used these arrows before but they were cut at 28.5" but I was shooting close to 60# at the time.

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    I Assume these calculators are close;
    Arrow weight and FOC, down towards bottom;

    http://www.huntersfriend.com/carbon_..._chapter_4.htm

    Arrow speed and KE;

    http://www.backcountrybowhunting.com/articles/calc/


    P.S. For fun I played with some numbers, assuming a 45 pound DW and a 29 inch DL (my one bow - 320 IBO); going from 350 grain arrow to a 450 grain arrow the KE remains the same; 50 pounds, BUT drops the speed from 254 down to 224. I might would consider the advantages of speed... o
    Last edited by otisT; 08-27-2014 at 08:00 PM. Reason: I can never get anthing right the first time, or second.
    Anything I may post is in no way meant to besmirch anyone or any entity in any way, so please don't take it, wrongly, as such. Thank You.

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    Senior Member Speedykills's Avatar
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    Quote Originally Posted by otisT View Post
    I Assume these calculators are close;
    Arrow weight and FOC, down towards bottom;

    http://www.huntersfriend.com/carbon_..._chapter_4.htm

    Arrow speed and KE;

    http://www.backcountrybowhunting.com/articles/calc/


    P.S. For fun I played with some numbers, assuming a 45 pound DW and a 29 inch DL (my one bow - 320 IBO); going from 350 grain arrow to a 450 grain arrow the KE remains the same; 50 pounds, BUT drops the speed from 254 down to 224. I might would consider the advantages of speed... o
    I ran my numbers on calculator seems the kinetic energy stays at 62lbs just speed goes up and down going to get arrows cut tomorrow might get them done at 28.5 and play with the 25grn weight see how it goes.firecat is rated a 335-345 so speed should still be good.

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    lol yep! speed should suffice! One other point; I THINK the lighter/faster (shorter, too) arrows also gives a 'better', higher FOC, retaining a 100gr. tip, which would also add to the speed; lighter/faster, plenty of KE... Best of luck with whatever you end up with... o
    Last edited by otisT; 08-28-2014 at 02:42 AM.
    Anything I may post is in no way meant to besmirch anyone or any entity in any way, so please don't take it, wrongly, as such. Thank You.

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    Thought I posted this, but will again.

    SPEED ADJUSTMENT Rule of Thumb

    2 fps / 1 # of draw weight
    10 fps / 1” of draw length
    1 fps / 3 grains of arrow weight
    1 fps / 3 grains of weight on the string
    Former and current Back Yard Champion. I beat myself

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    Senior Member wscywabbit's Avatar
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    Also, you may want to check your FOC manually instead of with a calculator; those Pile Driver arrows have Carbon Express's new weight forward carbon weave meaning that the front of the shaft is heavier than the back....
    In God and guns we trust;
    • One nation, under God, indivisible, with liberty and justice for all.
    • A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.


    2011 Onza 3: 70#, 28.25 draw (AMO), 384 gr arrow, 288 fps
    2005 Saber: 70#, same arrow, 250 fps

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