Like John said...
Mike Schwing from Maryland
>I cut'm round on the bandsaw first. If you don't have one, aim to take as much as you can off first with the chainsaw. Draw a circle a little larger than the finished size you seek and cut to that line with the chainsaw. Careful though, small cuts on small workpieces is not best left to a chainsaw.
Rounding up a blank on the lathe is no fun and the less you have to the better. Also kind of dangerous to have hard/sharp corners flying around near your hands. If you have a medium sized lathe, like me, you'll be able to swing a larger workpiece if its balanced before it goes on the lathe.
I find that my "freehand bandsaw cuts are easier than that with a circle jig on all but the deepest blanks. others find their circle jig to be most efficient.