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    • 8pointer
      Post count: 4

      whats the best spine wt for a 45lb benperson recurve ? 40-50 or greater? thanks

    • bruc
      Member
      Post count: 476

      Welcome 8pointer!!

      I’m not the expert but I think they will need your draw length as well, to determine proper spine.

      Bruce

    • Robin ConradsRobin Conrads
      Admin
      Post count: 907

      I will add my welcome to Bruce’s. We’re glad to have you here 8pointer.

      A while back we posted a Tip of the Week on Wood Arrow Spine from T.J.’s book The Traditional Bowhunter’s Handbook. I hope it helps get you started.

    • David Petersen
      Member
      Post count: 2749

      8pointer — wood shafts are spined in 5-pound increments and the old rule of thumb is to spine “one step above” your draw weight. Thus, 50-55. However, as Bruce said, it’s not always that simple. The old guideline is based on cedar shafts and a 28″ draw. But it’s a starting point. Check T.J.’s book, for sure. dp

    • Robert Gilbert
      Member
      Post count: 22

      To add to Mr. Petersen’s reply , add an additional 5# for broadhead and an extra 5# for every inch of arrow length over the 28″ mark .
      Example : I am shooting a Montana ,45# at 28″. My draw is 27.5 and my arrow length is 29″. My broadhead is a two blade 125gn. Magnus . The arrow spine , for me , is 55/60 . Sometimes I feel that 60/65 would be better . It’s all in the shooter .:):)

    • Stumpkiller
      Member
      Post count: 193

      There’s a bit to it. Add 5# spine for every inch of arrow over 28″ AND 5# for every additional inch you actually draw past 28″ (some guys make 30″ arrows but only draw 28″). Reduce for every inch under 28″ And add 5# if you shoot a head heavier than 145 grains.

      One good bet is to order a “try set” of arrows in different spine increments. Some fletchers even loan a set to you with a security deposit refunded when you send them back. Three Rivers sells a try set. That way you can try several and see what works. Release, bow shape and type all make for variances in needed spine.

      Recurves, in general, are more forgiving of a heavy spine; so round up rather than down. Longbows (not cut to center shot) want the proper spine .

    • 8pointer
      Post count: 4

      i thank you all for all the help and tips ..the first arrow is 30 in with a 55-60 shaft and a 145gr feild tip .. i hope it it shots as good as it looks…. thanks again to all…

    • 8pointer
      Post count: 4
    • Bounty Hunter
      Post count: 149

      Sorry for just seeing this thread.

      I build a lot of wood arrows and there are a lot of varibles that go into deciding the correct spine for any given bow and archer. Here is a list.

      Bow Weight @ 28″
      Type of Bow
      Archer’s Draw Length
      String Material
      Point Weight
      Arrow Length

      What is missing is the Draw Length and String Material in this case. If I were to assume Draw Length is 28 inches and the String is Dacron then I’d recommend 60-65 spine for a 30″ arrow and 145gr points. If the Draw Length is over 28″ it might change things, as would if the String were fastflight. With a draw of 29 inches and a fastflight string I’d recommend a 65-70 spine.

      Good luck and again sorry I didn’t see this sooner so I could have asked these questions to give you a good recommendation.

    • Duck Master
      Post count: 3

      if the bow is centershot you should go one hevier so 50-55 if not i would go with 45-50

    • SteveMcD
      Member
      Post count: 870

      What’s your draw length? If assumed to be 28 inches than you need a 29 inch shaft from the valley of the nock to the bottom of the point. So add 5#, than if your points are 125 grains or heavier add another 5#. So your shaft spine shuld be 55-60#. If your draw length is less than 28 say 27 inches, than 50-55# would do it. Hope that helps.

      There are those that believe less spine is better. And there are those that believe more spine is better – I always side on more spine.

    • RI Swamp Yankee
      Member
      Post count: 20

      Do we really mean draw length here, or is actual arrow length the more important factor in chosing the correct spine?

    • SteveMcD
      Member
      Post count: 870

      RI Swamp Yankee wrote: Do we really mean draw length here, or is actual arrow length the more important factor in chosing the correct spine?

      If 8Pointer is shooting a recurve then yes. Draw length is a factor. If a recurve is 45 @ 28 and your draw length is 27 inches than your total weight pulled by the bow is then 40#. With recurves the weight is incremental based upon draw length, with longbows 45# is a static weight and remains 45 regardless of draw length (over drawn will result in some stack, but not an issue here).

    • RI Swamp Yankee
      Member
      Post count: 20

      Steve,
      I understand all that. But the original question was about what spine arrow to use. I think actual arrow length has more to do with figuring that out than draw length.

    • SteveMcD
      Member
      Post count: 870

      RI Swamp Yankee wrote: Steve,
      I understand all that. But the original question was about what spine arrow to use. I think actual arrow length has more to do with figuring that out than draw length.

      Correct. AGain we are talking about a Recurve. If his draw length is 27 inches than 55-60 would be too much spine. If his draw length is 29 inches than 55-60 may be too litte spine.

      Check out the 3Rivers Chart for more details –

      http://www.3riversarchery.com/pdf/WoodChart.pdf

    • Buckhorn73
      Post count: 77

      8pointer – In the event you are still seeking a response ref. your arrows, I used a setup very similar to yours, 29″ arrows but a 28″ draw and found my best spine weight to be 50-55 lb, with field point and broadhead from 125 grain – 150 grain.

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