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Paper tuning issue.

Discussion in 'Tech Talk' started by NickB, Feb 13, 2013.

  1. NickB

    NickB Weekend Warrior

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    So I just bought a Mathews Helim. I had it set up at the dealer and I decided to shoot it through paper to see how my arrows were flying. I'm getting a high right tear and I cant not get it to change no matter what I do the rest. What else could be causing this problem? Need some help, Thanks
     
  2. Bootlegger

    Bootlegger Grizzled Veteran

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    What kind of arrows, broadheads....so on?
     
  3. NickB

    NickB Weekend Warrior

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    They are Beeman ICS hunter 340. 100 grain field points right now. 70 lbs bow with a 29.5 inch draw
     
  4. trial153

    trial153 Grizzled Veteran

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    Persistent high right tear, couple of things...

    First ...look for fletching contact...if not

    Then try to adjust (lower) your Loop( Nocking point) to remove the high tear...if that doesn't work...then

    Your probably under spined ...move to a 300 spine.


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  5. Backcountry

    Backcountry Grizzled Veteran

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    Any way you can post a picture of the side profile of the bottom cam? Like Trial said, adjust your loop down a bit to correct your high tear. Also, is the idler wheel leaning at all?
     
  6. NickB

    NickB Weekend Warrior

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    On the Mathews bow is the string suppose to go right through the center of the timing hole? and if it's off center but still in the hole will it alter how the bow shoots? I took the bow to the pro shop today and had them lower the d-loop. Literally no matter which way I move the rest up, down, left or right it still tears high right. I'm not sure what to look for when it comes to cam lean.
     
  7. Backcountry

    Backcountry Grizzled Veteran

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    String should bisect the hole. Sounds like you could be dealing with a spine issue, possible tuning issue, or a grip issue. How long are the arrows? Idler wheel up top is easy. Hold the bow in front of you as if shooting. The string and idler wheel should line up in a straight line with eachother. If it is off you will see the wheel leaning left or right.

    If possible post a picture looking at the idler from the rear.
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  8. trial153

    trial153 Grizzled Veteran

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    Assuming your not torquing the bow...it sounds like your well underspined from the specs you have....

    Try this....Is it a 60-70 pound bow? And you shooting at 70? Turn her down to 60...shoot the same arrow and see if it cleans up the right tear. If it does thm you know you need a .300 spine to shoot at 70...


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  9. indynotch50

    indynotch50 Grizzled Veteran

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    Yes, the string should be centered in the hole on the cam wheel.
    If you're at 70#, a .340 spine with a 100 grain tip should be on so I don't think spine is the issue.

    I would look for fletching contact. Are the forks on the rest discolored? Any lines of the fletching.
    What rest do you have?

    Take a pic of the tear.

    Are you sure you're not torquing the bow?
     
  10. Backcountry

    Backcountry Grizzled Veteran

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    Curious as to the make of rest.

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  11. NickB

    NickB Weekend Warrior

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    So the string should be centered in the hole? My arrows are cut at 31 inches.
     
  12. NickB

    NickB Weekend Warrior

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    The rest is a QAD ultra hdx
     
  13. trial153

    trial153 Grizzled Veteran

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    31" .340 70 pound single cam...now I know we are underspined.

    Move to .300


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  14. Backcountry

    Backcountry Grizzled Veteran

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    This, or can you cut the arrows shorter? You should be able to get them down to 29" at least.

    Yes your strings needs to be centered in the tuning hole, is it?

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  15. NickB

    NickB Weekend Warrior

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    sorry my arrows are 30.5 inches, but I don't think that's going to make a difference. It also does look like my vanes may be making contact with my rest on the bottom side. What do I do about fixing that? You don't think shooting that arrow has messed my bow up at all do you ? And my String is off centered in the timing hole.
     
  16. tfox

    tfox Grizzled Veteran

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    Sounds like fletch contact. High tear regardless of what you do.

    Your rest should come fully up in the last inch of draw, no sooner.

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  17. tfox

    tfox Grizzled Veteran

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    I did not read this before my last post. Wrinkled vanes equals contact.

    Arrow did not hurt your bow .

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  18. NickB

    NickB Weekend Warrior

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    Ok, I'm thinking my rest is coming up to soon.
     
  19. tfox

    tfox Grizzled Veteran

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    That equates to the rest staying up too long with the qad.

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  20. trial153

    trial153 Grizzled Veteran

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    No it hasn't messed your bow up.

    I think you have multiple things going on. Try not to be over whelmed.

    1) fix the contact problem. Two ways and you might have to do one or both. Your rest may need to be adjusted to drop faster, and you should rotate your nocks to see if you can get better clearance.

    2) The spine of your arrow is a too
    weak. Your shooting a fairly aggressive single cam bow, most of which tune easier with a stiff arrow. You have several options to fix this:
    A) buy a stiffer arrow...something .300 spine
    B) cut your arrows down so they are shorter
    C) take a turn or two out of your limb bolts to get you down to say 65 pounds.
    Or B + C ...
    Hope this helps
    I


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