a round belly can be made with hickory, I shoot a 110 lbs warbow hickory, supercore, hickory.
Although most would suggest a different, denser wood for the belly.
Also for 80 lbs you can make a selfbow of hickory only.
Or ash, or even elm.
I would make a selfbow from hickory, 90-100 lbs on 32 inch, it will end up on 80 lbs after a year of shooting.
Have fun!
Imar