Rose City POC Spine Variability

[YosemiteSam]

After chasing a hinge on a selfbow build last week (obviously working too fast), I ended up with a fairly decent 25# bow.  It took me about a week to get over it and finish it enough to fling a few arrows out of it.

I took five 30-35# POC shafts from Rose city that I bought for my last self bow that broke after 10 days (hey, I'm learning), glued on some nocks & points full length and see how the shafts flew.  3 were beautifully straight in flight -- spined perfect, I'd say.  2 were showing pretty stiff (nock left and impacting right about 12" at only 15 yards -- shooting left handed).  I marked them accordingly and tested them over several rounds.  Same 2 arrows showing stiff and the same 3 grouping perfect.  All 5 are reasonably straight shafts.

My question is whether this is the kind of spine variance to be expected from POC (is this normal) or if I just got a bad batch.  Can the variance be tweaked by adjusting point weight (brass tubing) or will that just make things worse by having different arrow weights?

For further info, the bow is a basic pyramid design with an ambidextrous grip so I need a fairly weak spine -- hence the 32" shafts.

Any thoughts or advice is welcome.

[Gordon Jabben]

I bought a thousand Rose City shafts from The Nocking Point in 2003 before the big tax increase and knowing they were spine tested by a machine, I spine tested them by hand.  After a hundred or so  without a single one out of a five pound range, I felt like I was wasting my time and quit.  It has been my experience, bare shafting wood arrows will make you wish you had carbons or aluminums and having three out of five fly perfectly is about my average.  With a bare shaft that hits the bale perfectly and groups with my fletched arrow, I can turn it over and shoot it and it may hit somewhere else.  JMHO

[LittleBen]

Originally posted by Gordon Jabben:
It has been my experience, bare shafting wood arrows will make you wish you had carbons or aluminums

That about sums it up.

[snag]

Bare shaft tuning wood is easy. I have never understood why some have such a hard time with it. Must have started out with spine weights that aren't even close.

To answer your question, you need to check these shafts spine. If they are not matched in spine then contact who you bought them from.
If your form and shooting ability are not the cause then this should not be occurring with any shaft material.
If they are stiff you can add more of weight. Using 125gr. then go up to 145 gr., still stiff? Go up to 160 gr.

[longbowman]

I've been using Rose City shafts for years and like Gordon said, I can't find a variance with them at all.  They are top notch all the way and the only arrow material I use.  Never having been a compound shooter I don't mess with the bareshaft stuff but I always tune my bows using the broadheads I plan on hunting with.  Once they are flying filed tips and judos always fly.