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Searching For Correct Spine
#1
So through my recurve bow I'm having trouble finding the correct spine for my set up. I'm pulling 46 pounds at 27 inches and shooting Carbon Express Predator II 4560 at 29 inches. I had 100 grain tips on them and the arrows were hitting in the target cocked left. I referred to my book and it said I'm under spined. I tried 125 grain tips and I'm getting the same result. Any suggestions? Is a different arrow in order?



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#2
GT3555's, full length, 125gr point should be primo
Retired Competition Shooter
2005, 2006, 2012 IBO Trophy World Champion
Virginia Bowhunters Assoc State Champion
Grim Reaper prostaff 10+ years

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#3
If anything I think you're over spined not under. If you're hitting nock left I think it's more of a tuning issue than just spine. As mentioned in my PM the bow might not be center shot. You might have to bolster the side plate out. But first before you do all that try adding much heavier tip, more than 125gr.
I do some research on left nock issue. Let see what Gutpyls and rcw3d say also.


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1 Mathews Monster 6 - gen 1
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#4
Yeah, it's pretty unanimous, you're over spined. Everyone agrees you need 3555, 500 spine arrows. You can try a 250gr point but if you buy broadheads most are 100-125gr. Of course there are heavier ones out there but then you have to tune the bow to them because you might have wind plane issues.


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1 Mathews Monster 6 - gen 1
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#5
Ok great thanks again guys. I'll get a few ordered here today!


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#6
So I should go full length? Or have them cut to 29?


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#7
I think I'd leave em full length..

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#8
(03-10-2014, 01:50 PM)Tony Messina Wrote: So I should go full length? Or have them cut to 29?


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FULL LENGTH ONLY....never cut them.
Retired Competition Shooter
2005, 2006, 2012 IBO Trophy World Champion
Virginia Bowhunters Assoc State Champion
Grim Reaper prostaff 10+ years

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#9
Lancaster cut my predator II's to 29 inches, they recommended that. That's not good?


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#10
(03-10-2014, 04:19 PM)Tony Messina Wrote: Lancaster cut my predator II's to 29 inches, they recommended that. That's not good?


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By leaving the shafts full length it leaves room to cut as needed. Cutting them prior to tuning reduces the variables for adjusting spine. A shorter arrow will of course have more spine than a full length.


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Bows, Broadheads and Backstraps
Bows and backstraps

Many recurves and
1 Mathews Monster 6 - gen 1
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