I agree with bigcounty. Get a piece of hickory and build a bow from it first. No ring chasing and can make a very nice bow. I've made a couple of black locust bows and they are nice. I'm still getting hang of chasing rings. If you are bent on making a bow from wood that you have to chase a ring on, I'd buy a good osage stave. I haven't built one from osage yet but it's the "holy grail" of bow wood. Just my 2 cents.
Aaron