someone help me a little more on Ex-FOC

[BobW]

Okay, here is the situation:  If I am already "heavy" spined due to arrow length (lets say uncut factory shafts), and due to this length, they are spined pretty heavy (CX Heritage 250"s) with 225 - 250 up front to make them fly decent, all this to be shot out of a 56#@32" bow, won't going up in point require a once again heavier spine, subsequetly more arrow mass, and I have already shot 350's with 275 up front.  I'm out of shaft selection.

I have been interested in going to wood shafts, but from what I have been able to understand, I am already nearing a 90# spine and an arrow that is over 700 grains.  What the heck do I shoot with EX_FOC?  

A Telephone pole with a meat cleaver on the point?

Where is the "break" point?  Maybe I'm already there, and don't know it.

[Shawn Leonard]

Ya can find some carbons that are at that .300 mark I believe. That said I would think a full length 350 should only need around 225-250 up front, if ya draw a full 32"s. Shawn

[Dr. Ed Ashby]

Bob, the long draw is giving you some problems, but not insurmountable. The longer your shaft, the more weight rear of center. You're going to need to put more tip weight on AND try to reduce weight towards the shaft's rear. The first obvious step is to use a lower mass/inch shaft. You can get much lighter weight shafts of equal deflection.

Nect, consider adding a bit of internal footing back of your insert. This could be a 5" to 7" piece of a small diameter carbon shaft (I have some old Beman Youth Shafts that are a perfect fit inside GT's, CE's, etc.) or the IF could be other material(s). This not only adds a bit of tip weight, it shortens the working section of the shaft, increasing the dynamic spine.

Hope that helps some,

Ed
TGMM Family of the Bow

[Pete W]

You can shim out the side plate after you reach the point where the shaft is actualy weak.

[Dr. Ed Ashby]

Dead correct, Pete. I often forget to mention that VERY USEFUL option. Most of my bows are far from center shot. Heck, some have peg rest!

Ed
TGMM Family of the Bow

[JC]

Originally posted by BobW:
I'm out of shaft selection.

Bob, try carbon tech Rhino 55/80 and the Safari 70/90...the two stiffest, in that order, that I have found. If I remember correctly, I think the Safaris were .190 spine. I can measure some today after church if you'd like.

Also the FMJ 300's spine about .285 on my tester and require a bit more length than my axis 300's.

JC