With my custom sanding machine, I can taper the back 9" of the shaft from 23/64 or 11/32" to 5/16". Doing this removes weight from the nock end of the shaft and increases FOC. This also means better fletching clearance.
I can also taper the front end of the shaft from 23/64" to 11/32", this eliminates any "bump" behind the point which may interfere with penetration.
Nock taper included.
$6.00 per dozen for tail taper.
$6.00 per dozen for front taper.