All that matters to me is that the completed woodie is in the 500-520 grain weight range.  Static spine really needs to be figured out beforehand, then a few arrows built and see if the bow is happy with what yer feeding it.  So, best to get a shaft test kit and do yer homework before ordering out many dozens.

I'd like to keep length constant, so I guess if needed a lighter broadhead.

Whatever the bow likes would be the woodie build formula.  A 145 grain point/head is best for me as that weight satisfies field, blunt, judo, and broadhead.  Change the front or back do-dads and that changes both spine and FOC.  It's nice if all arras are as consistent as possible.

It sounds like if I keep raw arrow shaft weight close the dynamic spine difference would be closer, and the arrows should behave about the same.

WUD you are correct about arrow weight and dynamic spine differences. Rob is also making some great points. I can tell from Rob's posts that he has it figured out what he wants to shoot and then has tweaked that setup to match his bow. It also appears he likes consistency and repeatability in that setup. I would look through his posts and figure out exactly what you are looking for when it comes to total arrow weight, length, tip weight, etc. Then you can order a test kit or a dozen arrows in a spine. You should be able to take multiple spines and tune them to your setup. You will also have a vast difference in total arrow weight and length amongst different spines. I tinker and shoot different spines, total arrow weights, different amounts of foc, different broadheads, etc. I get many setups to shoot well out of the same bow. It's just a matter of the end result you are looking for.

James;
Most of my bows are close in bow weight.  I have been able to get the same set of arrows, tapered and footed POC, to work well from my top three bows (63-66#) and 160-190 gr heads.  Will be trying to get 250 gr heads to fly.  I have been reading Rob's threads and others comments, so have a decent idea of where I'm headed.  Have a test set requested for Christmas and will have comment about shaft weight added to order.  If I run into issues there is a 60# recurve and two 70# bows that can be pressed into service.

Sounds like you have it figured out.

We'll see.  Looks like raw tapered shaft @29" with nock and point tapered would be @500 grains.

Spent some time this afternoon borrowing through my stockpile of wood shafts.  Besides the tapered and footed POC, found some tapered Ash which I knew I had, some Red Balau (643 gr) raw shaft at 29 1/2", some Hemlock, and Eureka, low and behold there are 7 raw DF shafts that I must have taken in trade.  3 at 70-74#, and 4 at 75-77# more than enough to get started staining and sealing to fletch.  They should be ready once I heal up enough to shoot.

After decades of sampling different shaft woods, from different vendors, I now buy a specific shaft wood, from a specific vendor who has shown a measure of consistency to their offerings, and that helps me to make more consistent arrows without re-pioneering new and different wood.

I have been shooting tapered, footed POC for years.  Have decided to try some heavier shafts to help quiet my already quiet bows.  Hemlock don't know where that came from!!!  Red Balau is almost as heavy Raw (643 gr) as a finished Cedar hunting arrow.  Great for close range hog hunting.  Tapered Ash, as well.(529 gr)  Tapered Douglas Fir is another heavy arrow material to try out.  I find that arrows of similar mass weight fly pretty close to equal for me.

Quote from: Rob DiStefano on November 22, 2023, 07:15:49 PM
After decades of sampling different shaft woods, from different vendors, I now buy a specific shaft wood, from a specific vendor who has shown a measure of consistency to their offerings, and that helps me to make more consistent arrows without re-pioneering new and different wood.

Would that be doug fir from Surewood Rob?

Quote from: Maclean on November 23, 2023, 10:48:07 AM

Quote from: Rob DiStefano on November 22, 2023, 07:15:49 PM
After decades of sampling different shaft woods, from different vendors, I now buy a specific shaft wood, from a specific vendor who has shown a measure of consistency to their offerings, and that helps me to make more consistent arrows without re-pioneering new and different wood.

Would that be doug fir from Surewood Rob?

Yes.

I've been extremely happy with the shafts from Carson.

I would like to try some sitka spruce from Trueshafts, but having a hard time finding the spines I want in 11/32".

Carson has been very responsive and helpful via e-mail, I'm sure I'll be happy with DF shafts.