More spine help. I just dont get it!!!

[T Folts]

Last week I worked on some Heritage 150's for my 50# Savannah,I have a 12 strand D97 string.
and what I came up with was 29"BOP and they still were a little weak with 175gr points and about right with 145's. Good enough to live with for now. I thought I would be able to go 200 gr up front at 29bop.

Next I just got some douglass fir shafts spined at 60-63# I cut one to 301/2 bop and it was weak so I took it to 29 1/2 bop (125grain tip)and it was still weak and cracked the shaft on second impact. What gives I cant believe these would be weak at this lenght and point weight.  Any help figuring this out?

Terry

[Shawn Leonard]

Terry, those 150s should be stiff at that #age, I shoot them off a 56# Schafer and a 54# Arroyo, both high performance recurves cut well past center and I cut them to 29.5"s and shoot 175 up front. Are ya using OLs method of bareshaft tuning which is point of impact. I also should say I need 75-78# woodies cut to 29.5"s with 125 grain points to fly off these bows. I would think ya need 65-70# woodies cut to 30"s to fly off that Savannah. I had one that was 55#s and shot 70-75# 30" woodies form it. Shawn

[T Folts]

Shawn On the carbons I was using OL point of impact but also paying attention to nock/point oreintation. On these woods I am bareshafting one arrow only using the nock/point method.
Terry

[GameGetter]

too many things can effect a wood shaft to use only one to test with. If that shaft cracked on you it may have aready had an internal crack which would have made it show week intill the break happend.

[jacobsladder]

terry ...what is your draw length? are you pulling 50 pounds or is that just what the bow is marked...steve

[Shawn Leonard]

It is impossible to use nock point orientation unless you have a target that is super consistent and if it has been shot at all it won't be so you can get a different result every other time. Shawn

[Kingstaken]

terry was the nock installed correctly in relation to the wood grain on the bare wood shaft?
I've seen a couple guys who completely built the arrows and put the nock on the wrong side of the grain only to have them break on impact when shot.

[Curtis Haden]

Terry, I can't help you on the woods question, but I have had less than "conventional" results with the CE 150's.  I'm shooting a 52# hybrid longbow, and I'm getting just slightly weak with a 29.5" shaft and 175 up front.  My bow is a Griffin, and it's maybe 1/8" before center cut on the riser.  I'm pulling 28" with a skinny FF string.  I was shooting 250 grains up front (that's with a 50 grain insert weight) and had to drop down to get rid of the squirrely arrow flight.

I kept on fooling with point weight, kept going up, thinking my form/release was at fault, until one day I got a wild hair and tried the lighter points. Viola!!!  YMMV!!!

[T Folts]

Shawn, it may be the target I'll look at that next. It wasnt the shaft failure because I took another shaft and cut it to 28 3/4 and it did the same thing on the first shot. I pull 28"

[wtpops]

I use bare shaft nock point orientation IN FLIGHT not after it hits the target. Once i get close i switch to OL's method of point of impact, works good for me

[George Tsoukalas]

For every inch over 28 in bop  you loose 5# of spine so your shafts are behaving as if they are 55-60 or a bit less because you said they were 29.5 bop. That coupled with the dynaflight (add 5#) and how closely center shot our bow is (add more; possibly another 5#) may put you a bit weak. Jawge

[Tilbilly]

Where'd you get the fir? Regardless of spine, there's some good fir out there and some not-so-good. It may be a separate issue from the tuning.

[LonePine Paul]

According to DR.Ed you should dump the fir and go to heavier shaft.He suggests hickory.PT