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Spine question

Discussion in 'Bowhunting Talk' started by SuperKirby, Aug 11, 2016.

  1. SuperKirby

    SuperKirby Weekend Warrior

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    I changed my setup some so wondering if I need to drop my arrow spine? I was shooting a bout at 62 lbs and using 350 spine Victory arrows. I'm down to 55 lbs from a Bear arena 30. Do I want to change to a 400 spine arrow? Thinking I'll probably end up with Gold Tips if that has any bearing.
     
  2. bow nut

    bow nut Weekend Warrior

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    400 should be good up to 60 lbs. And GT quality for the $
     
  3. SuperKirby

    SuperKirby Weekend Warrior

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    If I stick with 350 will I be over spined? My only concern was that because the Arena is a faster bow I don't want to be right on the other edge and then if I bump up a few pounds in my draw weight have that push me over.
     
  4. johnathanb19

    johnathanb19 Newb

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    Carbon express use 250 or a 4560. Gold tip use a 400. Do not use a lightweight arrow with that Poundage. I've seen people try shooting a 150 acc with a 65lb bow and the arrow literally blew up in mid flight.
     
  5. buckeye

    buckeye Grizzled Veteran

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    Your draw length would be an important consideration in determining what spine would best suit you.
     
  6. bow nut

    bow nut Weekend Warrior

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    Over is way better than under spined . Not gonna hurt that way if u do crank it up your covered. Just excessive weight for 60lbs. Not as fast if it's a concern.
     
  7. copperhead

    copperhead Grizzled Veteran

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    Need to know how long your arrows are and tip weight also helps.
     
  8. Justin

    Justin Administrator

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    What he said.

    Although assuming you're in the 28-30" draw length range and shooting a 100 grain tip, a 400 spine arrow is most likely your best option. At 55 lbs you're pretty well smack in the middle of the 400 range on any chart I use. You really don't start pushing into that 350 range until you hit 65 lbs and above.
     
  9. tynimiller

    tynimiller Legendary Woodsman

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    Higher FOC (heavier tip-end) will up the spine needed as well...if merely going off of charts my black eagles should be 350 but that is based on a 100 grain broadhead and no added weight...I shoot a 125 and added weight...so I shoot a 300.
     
  10. SuperKirby

    SuperKirby Weekend Warrior

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    Sorry for the omission on the important stuff. I have a 27" draw and was planning to use 100 gr. Muzzy trocars.

    Am I best to stick with just a standard GT XT Hunter? Would my setup be better with a heavier arrow like the pile driver? Or what do you all recommend?
     
  11. Justin

    Justin Administrator

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    With that short draw length at 55 lbs you're definitely a 400 spine arrow. In fact, you're almost on the brink of something even a little lighter.

    As for arrow choice, everyone will have a different opinion as we all like something different. Both the GT's or the Pile Drivers will work just fine if you have the proper spine and you hit where you need to.
     
  12. tynimiller

    tynimiller Legendary Woodsman

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    I'd bump up to 125 grains myself...the spine will benefit from tick higher FOC. Just my .02 tho
     
  13. buckeye

    buckeye Grizzled Veteran

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    Well since you asked....


    Gold Tip Velocity XT .400 shafts cut to 28.5 inches shaft to shaft or 28.75 shaft to throat of the nock.
    Gold Tip acculite nock and insert.
    100 grain heads.
    Three 2 inch vanes, Quickspin, Blazer, etc


    Your specs
    268 FPS (aprox)
    352 grains
    6.4 grains per pound
    13.25% FOC
    56.19 KE

    Or

    Gold Tip Velocity XT .400 shafts cut to 27.5 inches shaft to shaft or 27.75 shaft to throat of the nock.
    Gold Tip acculite nock and insert.
    125 grain heads.
    Three 2 inch vanes, Quickspin, Blazer, etc

    Your specs
    262 FPS (aprox)
    369 grains
    6.7 grains per pound
    15.96% FOC
    56.37 KE

    Either of these scenarios will offer a perfect spine match and is an excellent tough as nails arrow.
     
  14. SuperKirby

    SuperKirby Weekend Warrior

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    Thank you for the excellent information. Short of buying and building the arrows I don't think you could provide much more than that.
     
  15. buckeye

    buckeye Grizzled Veteran

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    You are welcome.

    Another opinion: I would lean to the second option that I listed above if you are not against having to buy new broadheads along with the arrows.
     
  16. SuperKirby

    SuperKirby Weekend Warrior

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    I'm not opposed to it necessarily. It depends on how much I end up spending on arrows. Or if any has some 125 grain fixed heads they want to trade for 100 grain fixed heads...
     
  17. tynimiller

    tynimiller Legendary Woodsman

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    Another cheaper option would be screw in added weights. Every arrow company I've ever bought from offers them. Ranging from 10grains up to 100 typically.
     
  18. BB4tw

    BB4tw Die Hard Bowhunter

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    If your over spine arrows will tune at the lower draw weight then why replace them?

    I purposely over spined my son's arrows for two reasons. One: to get his total weight up to 380 (10 grains/#Draw) and two: provide upside room for him to grow and increase draw lenght and weight.

    His arrows that are too stiff broadhead tune just fine.
     
    Last edited: Aug 12, 2016
  19. bow nut

    bow nut Weekend Warrior

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    GT kinetics in 400 would help with penetration at 55 lbs
     
  20. killer chill-r

    killer chill-r Weekend Warrior

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    I shoot an Arena 30 also, my set up is at 63#, 30" dl & I shoot a Easton 340 spine with a 100gr tip. Tunes great. I would slap a 125gr tip on the 350 spines & see how they tune. I think with a 125gr head you would be fine because the cams on the Arena are some what aggressive.
     

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