Since Pat M. has mentioned me as having good luck with Black Walnut as a bow wood I feel the need to clarify some things. It is a 2nd string wood that can make a good bow with proper heat treating, and design. Inferior to woods such as Osage,Elm, Black Locust, Yew, etc,etc. Low mass ,and soft, thick outer growth ring, and just Ok in tension, and lacks in compression. Akin to Birch. Easy wood to carve on, and smells good. Draws smooth when finished, and shoots with average speed. Less sensitive to humidity than Hickory once complete. Most of my bows from Walnut were made from clean thick saplings.I have made my share of Walnut bows, and can honestly say I have never had a back break with Walnut even with some violation. This has been my honest experience with Walnut for bow wood.If you have access to it ,harvest it ,and give it a try. A good wood to learn on.