Honey locust is decent wood, but it is a step below good elm and hickory, to my mind. Treat it like white wood, not BL or mulberry or osage. Wide and flat, heat treated, etc. Small branchless trunks 5" or so across gave me my best success.
You can chase a ring of heartwood, and the heartwood is definitely harder, but you gain little as far as wood properties. Small trees often have a kind of mild hairpin zig-zag to them and that makes it hard to work down without hurting it. Also, and take this with a grain of salt, big tree trunks with wide rings often have much softer wood, almost like it is porous.