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  1. #1
    Member
    Join Date
    Sep 2005
    Location
    Northern OK.
    Posts
    31

    Default Arrow speed gains?

    I am trying to gain more speed for a youth/ladies bow. The bow is shooting on average about 185 fps. My question is, with arrow weight only , what is the average reduction in grains to gain 1 fps? Is it, (-5 grns = +1 fps)? I think I have read this somewhere before but for the likes of me I can't find the info.

    Thanks.

  2. #2
    Senior Member
    Join Date
    Jun 2004
    Location
    Cleveland,NC
    Posts
    183

    Default

    Quote Originally Posted by OKbowhunter
    I am trying to gain more speed for a youth/ladies bow. The bow is shooting on average about 185 fps. My question is, with arrow weight only , what is the average reduction in grains to gain 1 fps? Is it, (-5 grns = +1 fps)? I think I have read this somewhere before but for the likes of me I can't find the info.

    Thanks.
    You are pretty much right with the 5 gr. formula. I would be careful not get the arrow weight below 6-7 grains per pound of draw weight. It is said that going lighter really fatigues the equipment. Such as, a 40# draw weight bow needs at least a 240 gr. arrow.

    If the rig is for target shooting, you may be able to flatten it out with lighter arrows. If the rig is for hunting, heavier arrows will dig in deeper.

    Hope that helps.
    Take a kid with you. Show them the Great Outdoors. Pass it on.

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