I have used a router table with a 1/8" cutter. Perfect each time, and even has a rounded bottom. You could foot the self nock with buffalo horn by makin a jig to stand your arrow up, and cut the slot to hold the horn with the table saw, once the glue has dried, remove excess horn then go to the router table and cut in your nock. Sand (round off) the ends to give it a classy look, and if you want more security, wrap with sinew (real or artificial... To each their own)
Good luck and please post some pictures when you are all done.