Jonathan, I drilled the center out to a 5/16th dowel size for 3 or 4 inches and used red oak dowels. then tapered it to slide into the 11/32 field point. It seems to be holding up pretty good, It is the first time I have ever done them this way.
Thanks Ryan! I fletched them by hand that is why they are off a little,
I bought the white cock feathers but I ground the turkey feathers myself. They were last year's birds..