Arrow diameter

[DC]

I'm spining some bamboo and OS arrows. I'm looking for mid thirties in spine weight. When I find some they look awfully skinny to me. The nock ends are about 1/4" or less and the pointy ends are around 5/16" or so. Does this sound about right to you guys are should I start examining my method a bit. I double checked my spiner and an actual 1/2" and 1" deflection reads properly on the gauge. My weight is 2.000 lbs on a good scale and my points are 26" apart.
Thanks

[Pat B]

When I cut sourwood shoots or cane I usually go about 3/8" at the base. The finished arrows are usually just under 3/8" at the point and 5/16" at the nock on a 30" shaft.

[Grasshopper Mouse]

I can't comment on the ocean spray shafts but the bamboo sounds about right to me.
Bamboo is a pretty strong material so a spine that light is liable to be pretty skinny. You may want to consider using a stiffer shaft with either heavier tips or a longer length to bring the effective spine down to your range.
Also, bamboo is a pretty forgiving material. It's quite possible that you will get great flight with a heavier spine shaft anyway.

Guy

[DC]

When I cut sourwood shoots or cane I usually go about 3/8" at the base. The finished arrows are usually just under 3/8" at the point and 5/16" at the nock on a 30" shaft.

You don't spine test your arrows do you Pat?

[Pat B]

I spine to find the stiff side of the shaft which goes against the bow but I don't spine test for spine weight.

[DC]

At the risk of hi-jacking my own thread, why does it matter if the stiff side goes against the bow? I've heard this many times and you reminded me to ask.

[duke3192]

Paradox, Paradox ,Paradox. goggle it.

[DC]

Nope, that won't cover it.  Unless there is a reason for the vertical spine to be less than the horizontal spine I can't see why it makes a difference which is against the bow. If I have a bow that wants a 30# spine and I have an arrow that is 30 one way and 40 the other, why not use it the way that will work?

[Pat B]

You should read spine from the stiffest side for the best arrow flight. That is hard to do safely with doweled shafts because you want the edge grain against the bow and only one sde is the stiffest but if that puts the grain "flames" pointing the wrong way you flip it over.

[bow101]

So Ideally Pat you would want the grain like in #2 photo when building arrows. ?   and if arrow breakage occurs it would fly away from your hand correct..?

[Danzn Bar]

Only with run outs like this.....

[Danzn Bar]

Not with run outs like this........

[bow101]

Not with run outs like this........

Its ok as long as the points are facing towards the riser and not the other way.

[Danzn Bar]

Wrong.....I'm done bow101...................
DBar

[Danzn Bar]

by the way ................The best is no run outs at all... ...................
DBar