Osage is a very strong, dense, resilient, but heavy wood. I do not make selfbows, so I will leave that subject to those that do. For glass laminated bows though, I think it is best to use it in limited amounts and only on the belly...where its exceptional compression strength can be utilized. IMO, using osage in the core or on the back side of a glass laminated bow in my opinion adds unnecessary weight to the limb and doesn't utilize the exceptional compression strength of that wood.