Completely wrong approach for what you want to do. A circle cutting jig on the bandsaw would cut the shape accurately, clean it up with an edge/belt sander. Doesn't sound like you have the proper power equipment for the job. The work piece is too large. Hand tool method would cut the shape with a bow saw, plane, scrape or sand to final surface.
With circular work, the grain reverses on each side of the apex. You often have to climb cut one side but you don't climb cut the same way you ordinarily cut with the grain. You start at the other end, take a nibble, then move ahead a little and take another nibble. You don't want to have any waste behind the cutter or it will grab. Hard to describe but it isn't something that's appropriate for your situation.