Arrow spine,got to be easier than I am making it

[Chapbutler]

First, I have a recurve I have been shooting for nearly 3 years, just in the yard, etc.  Really enjoy shooting and maybe work on hunting next year(2014).  

When I picked up the bow I picked up 3 2117's and for my purposes they did fairly well producing really respectable groups 15 or so yards.  However arrow flight is consistently erratic(a paradox in and of itself, pun intended).  Observation would seem to indicate a stiff spine as the arrow want to drift a tad right(I am a lefty).

So here is the data--43# at 28 which I believe places me in the 47-49 pound range at my 30 inch draw.  Recurve is a 64 inch Jeffery Royal Hunter cut(as best I can measure)1/8 inch past center with roughly 1/16 thick rest leaving -1/16. Arrows(2117) is at full 32 inch length with 125 field points.

Could someone please assist me.  I have looked at the miller calculator which shows need for a 60 pound spine. My questions then are as follows:

1.  Would I be better to play around with point weight on the 2117 or try another arrow?

2. If I were to try a carbon how difficult to tune as compared to the 2117 alum?

I know threads pertaining to spine are common.  But I wanted to try to get some help from those of you (all of you) who know more than I and hopefully may help my learning, etc.

Thanks and sorry for belaboring issues of arrow spine once more.

[Chapbutler]

Sorry, just read rules and saw no questions.  Mia culpa.

Won't happen again.  Seems to be routine for me--LOL

[Kelly]

2117 spines at 82# spine.
2016 spines at 62# spine.

When using carbon you should be using 500's or 35/55's. Only exception to this is if you have some Blackhawk carbon shafts then you would be using 3000's(they marked their spine backwords from the rest.

There is a real good spine chart at  www.arrowskp.com

[Chapbutler]

Thanks so much.  Will chec it out.

[Chapbutler]

Thanks so much.  Will chec it out.

[McDave]

Roy,

Saw your comment about "no questions," and wondered, what?  Think you misinterpreted the newbie info thread.  The request was for no questions in that particular thread only.  One of the greatest benefits of PowWow and this whole forum is answering people's questions.

[slivrslingr]

McDave nailed it, feel free to ask lots of questions!

[Flying Dutchman]

It all depends on your total set-up. Front weight, fletching, wraps, thickness of the string, center-cut, speed of your bow,  arrow length, your shooting style, it all plays a role...
Given the info you provided us I think that for carbons a spine of .500 (3555) would be a good starting point. Leave them full length, fletch a few as you actually use them and start playing with front weight. Gold Tip has a nice system for adding front weight:   http://goldtip.com/componentlanding.aspx?page=4     Once you found it, you're done. Just play around with different weights till you see and feel your arrows fly as they should.
If your form is close to perfect, you can start with bareshafting. When your form us not so good, bareshafting tells you more about your form then about the shaft.

[Looper]

I'd recommend getting some Arrow Dynamics Trad Lites, adding the point weight you want, tune the nock height, and have at it. Those shafts are very forgiving.

The AD Trad Lites weight right at 380 grains with a cap wrap, 3x4" fletch, and the stock aluminum insert. The AD Hammerhead Lites weight 440 grains setup the same.

The Hammerheads are a very tough shaft and will take a lot of abuse while stumpshooting.

[Todd Cook]

You can load up the point weight and probably get them to fly. I don't have any aluminum anymore but a 2117 is a good shaft. I would mess with those before I bought more. Many a critter been killed with a 2117.

[SCATTERSHOT]

Even correcting for length, you're still shooting a 70# spine (dynamic spine). i think you may have to use exhorbitant point weight to dial those in. Here's a spine chart that may be helpful.

Good luck!

 Arrow Length: From string groove in nock to back of point.
Bow Wt @ Your Draw 25" 26" 27" 28" 29" 30" 31"
30 lb    1616 1616 1716 1816 1816
35 lb  1616 1716 1716 1816 1816 1916
40 lb 1616 1716 1716 1816 1816 1916 1916
45 lb 1716 1716 1816 1916 1916 2016 2016
50 lb 1716 1816 1916 1916 2016 2016 2018
55 lb 1816 1916 1916 2016 2016 2018 2018
60 lb 1916 1916 2016 2016 2018 2018 2020
65 lb 1916 2016 2018 2018 2020 2020 2117
70 lb 2016 2018 2018 2020 2020 2117 2216
75 lb 2018 2018 2020 2020 2117 2216 2219
80 lb 2018 2020 2020 2117 2216 2219 2219

The following are results of my spine testing various aluminum shafts. They were all done on a Scheib Spine Testor and at 26" centers. I used the same method as I would have if doing wood shafting. The left readings are for XX-75 quality shafting. The others are from aluminum shafting with less alloy in its makeup, like the old Gamegetter or 24SRT shafting.


Shaft Size XX75 Spine Old GG or 24SRT Spine
1616  32#
1716  38#
1718  42#
1816  44#
1818  50#
1916 53# 55#
1918  60#
1920  65#
2016 61# 63#
2018 67# 70#
2020 77# 80#
2114 64#  
2115 70#  
2117 81# 83/84#
2216 84# 86#
2219 95# 98#

--------------------------------------------------------------------------------

[Burnsie]

Save yourself a lot of time and headaches and buy some Arrow Dynamic Lites.

[Chapbutler]

Thanks guys.  Your help is much appreciated.   If a neophyte can ever assist you let me know.  You all are the best

[SCATTERSHOT]

Actually, the chart I posted didn't come through as I had hoped. here's a link to the actual chart, which will be MUCH more helpful.

 http://web.archive.org/web/20071229024852/www.arrowsbykelly.com/Spine_Charts.html

[Shakes.602]

Next time try Wood Arrows too!      

[Bladepeek]

For what it's worth, I have a RH 50# @ 28 recurve that I still shoot occasionally even though I've switched over to lefty. When shooting right handed I draw 29" and shoot 31" 2117's well from it, but with 175gr points. Before I gave up on those 2117s, I'd load up the front end with some 175 and 200 gr points and see if they don't fly better.

[Chapbutler]

Thanks to all  Kelly's chart nailed it.  Got some 2016s and much more dart like flight. Feels good to see straighter impact on target.

[Matty]

What? No questions?  
IM OUTA HERE!!
     
Not only can you.... You should. And as you've seen EVERYONE IS WILLING TO HELP!!