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Thread: Draw-length question

  1. #1
    Moderator Stag Smeagol's Avatar
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    Default Draw-length question

    I am sure this info is in here somewhere, but I've read several threads and I am still a bit confused.

    I am building my own draw-board, and I want to know where to attach the measuring strip I have. Do I put it 1 3/4" in front of the post (where the throat of the bow grip makes contact)? I believe that will produce an AMO draw-length.

    My question: do I want AMO draw-length? When Elite says a DL is 29", is that AMO or some other standard? Or should I be measuring from the throat to the nock-point? What standard is that?

    Thanks!
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    Moderator Stag Maybee-R's Avatar
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    Default

    You got it. 1 3/4 from the grip side of the post.
    Here is more info to check out. AMO is Archery Manufactures and Merchants Organization Standards. Here this link is easier to explain.
    http://texasarchery.org/Documents/AMO/AMOStandards.pdf
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    Moderator Stag Smeagol's Avatar
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    Quote Originally Posted by Maybee-R View Post
    You got it. 1 3/4 from the grip side of the post.
    Here is more info to check out. AMO is Archery Manufactures and Merchants Organization Standards. Here this link is easier to explain.
    http://texasarchery.org/Documents/AMO/AMOStandards.pdf
    So, if I say my DL is 29", am I saying AMO? Because, if that's the case, then my DL is 30 3/4". ??
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    Respected Member Ten Point Stag hartofthethumb's Avatar
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    Quote Originally Posted by Smeagol View Post
    So, if I say my DL is 29", am I saying AMO? Because, if that's the case, then my DL is 30 3/4". ??
    Your DL is 29". That is AMO yes, so your bow will measure 27 1/4" from deepest part of grip to string at full draw. 27 1/4" + 1 3/4" = 29"

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    Senior Member Eight Point TANC's Avatar
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    Quote Originally Posted by Smeagol View Post
    So, if I say my DL is 29", am I saying AMO? Because, if that's the case, then my DL is 30 3/4". ??
    If you have measured your bow from the throat of the grip to the nocking point and measured 29", and you're telling anyone that listens that your drawlength is 29", that is commonly referred to as true draw. But it is 30.75" AMO, which is what you would order if buying a new one and you should be calling it in any discussions about your drawlength.
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    Moderator Stag Smeagol's Avatar
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    Quote Originally Posted by hartofthethumb View Post
    Your DL is 29". That is AMO yes, so your bow will measure 27 1/4" from deepest part of grip to string at full draw. 27 1/4" + 1 3/4" = 29"
    OK, so here's where I am perplexed. I put my bow on the draw-board last night. It's my GT500, and it's supposed to be a 29" DL bow. After cranking it back, it stopped at about 30.25" (I placed the measuring strip 1.75" in front of the draw-board post - from where the throat of the riser grip makes contact).

    I am looking at the nock-point, not including the d-loop. So, this tells me I am off by 1.25" inches. ?? That seems like an awful large gap from what I expect.

    Possible causes for the difference:
    1. String stretch?
    2. Cam timing? I do notice my cams are out of time, so I have to tweak that, but I don't see that making up for the 1.25" difference.
    3. Draw-board: I am pulling at the d-loop, which is the nock-point, so I doubt this would contribute to the 1.25" gap.
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    Respected Member Ten Point Don Beaver's Avatar
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    If you're measuring from the nock point to the throat of the grip your measurement will be off. You need to measure a straight path from the nock point to an area equal to the throat of the grip, but parallel to the nock point... if that makes sense...

    ... OR measure to an area on the string parallel with the throat of the grip, depanding upon how your drawboard is set-up...
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    Respected Member Ten Point Stag hartofthethumb's Avatar
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    you have #3 mods/cams on the gt? Cam timing is not going to really effect the DL, and these strings aren't going to stretch enough to add that kind of length, barring broken strands or other serious issues. From what you describe, you are measuring correctly. I would say the string cable lengths must be off. Stock strings? Have you measured the strings?

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    Senior Member Eight Point TANC's Avatar
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    I don't have a GT500, but assuming your cams/or modules are indeed 29", and your drawstops are in the correct place, you have string and cable issues. One of these GT500 guys should be able to help you. But I assume you need to time the cams, then take twists out of the cables and put twists into the string until your DL is correct.

    What poundage does your bow max out at ? Not theoretically. Looking for facts since that might tell us if your cables and string are an issue.
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    Moderator Stag Smeagol's Avatar
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    I think I just solved the mystery!!

    I just looked at the tune chart for the 2008 GT500 & 2010 GT500. Both say a #1 module is a 30" DL. I just put the new 2010 cams/modules on my 08 GT500, and the mods are #1. Hence, I am getting ~30" DL. Whew!! That 0.25" difference might be the angle of measurement I am taking (as mentioned by Don B. above).
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