Perfect Osage staves/logs/trees are hard to find at times.
If you have a choice in the future, look for trees that have the bark running straight up the tree and knot free and limb free.
Trees that have the bark twisting around the tree like a Barber shop pole will have the grain twisted inside the tree also, which is not good. A lot of times if you don't have a 6 foot good section but 3 feet of it are nice, then you can always do a Z splice at the handle and have a nice stave then made from sister billets.
I don't build stave selfbows out of my Osage, I cut out 3 foot boards like a 2 x 1" furring strip and z splice them together then back the bow with bamboo or hickory. I even do trilams by adding another core wood in the center.