Ah, I missed the post where you mentioned that you make longbows. That's a project that I'd love to try someday. I hunted with a compound bow in high school and started playing around with a primitive recurve recently but I've got a loooooong ways to go before I'm ready to hunt with one...or shoot it when someone else is around...A buddy of mine in Oregon made an osage longbow that he's taken all kinds of big game with, including a moose. Awesome hobby, just takes so much time.
From what I understand, osage was a very popular tree when people were planting hedgerows. My grandmother grew up on a farm in western Nebraska where there were zero trees originally (her parents still lived in a sod house past the turn of the century) so when the Civilian Conservation Corps or whatever came through planting trees that's what they used a lot of. I always thought they were native to the part of Kansas I grew up in because they were so widespread but apparently their native range is just a small chunk of land in Texas, Oklahoma, and a tiny bit in Arkansas. I didn't realize they were so common even further north.