The worm holes are not deep, maybe not even through that ring. I want to make a bending handle bow. If I go down one more ring it's unlike that I will have enough wood in the handle to make a 45# to 50# bow. I would have to glue on a riser and make a stiff handle bow.
Yes these holes are in the working part of the limb, the bottom 1/3 near the handle.