Question about reducing arrow spine

[TroyH]

Here's the scenario.  I have some real nice river cane that I'm making into arrows.  The problem is that they spine a little stiff.  I think I can reduce the spine a some by doing a little sanding, but I obviously don't want to get too aggressive.  Can't I get basically the same effect by simply lengthening my arrow?
Doesn't it go something like, add an inch and you can go down 5 lbs or visa versa in draw weight?  In other words for a spine that is too stiff you could lengthen the arrow to achieve the effect of a lesser spine?
Am I correct or just wandering in the dark :-)

[SCATTERSHOT]

I have some cane that spines in the 70's that I shoot at 30" long, even though I have a 26" draw. I use 160 grain field points, and they shoot fine.

[TroyH]

My situation sounds about the same.  I typically shoot 28" arrows though my draw is closer to 26".  I made some small game points/semi-blunts that weigh around 160.  My cane is spining 10-15 #'s over my draw weight, so I think I will cut my arrows a few inches longer, probably 30".

[SCATTERSHOT]

Between the heavy points, extra length, and natural taper, I think you'll be surprised.

[aromakr]

You are correct, by lengthening that arrow you will weaken the spine, the rule of thumb is 5# per inch.
Bob