Arrow Weight Variation?

[Fletcher]

Pac, most of the custom builders will sell matched shafts, myself included.  All of my shafts are tapered and I do the spining and weighing after they are tapered.  Braveheart Archery has matched parallel Surewood Fir.

I match to 10 grains and five or less pounds.  Spine is much more critical, IMO.  BTW, 65-70 is six pounds, count 'em.

While going thru bulk fir, I have seen up to 150 grains spread within a spine group. 100 gr is common with POC, Sitka Spruce will only go maybe 50 gr.