It's a soft bullet and the remaining pieces aren't smooth at least they don't appear to be in the picture. You likely hit a good sized bone I'd say it worked as advertised. Once the bullet deforms enough to loosen the mechanical lock there's nothing to hold the jacket to the core as it is not bonded
170gr Hornaday and 3030 is a pretty well proven load
Fire into a line up of water jugs and check recovered bullets. If a couple more blow up than maybe you got a bad batch. If they mushroom out you'll know this was a fluke. Either way enjoy the bear meat. My arm isn't healed enough to allow me to go bear hunting this spring
170gr Hornaday and 3030 is a pretty well proven load
Fire into a line up of water jugs and check recovered bullets. If a couple more blow up than maybe you got a bad batch. If they mushroom out you'll know this was a fluke. Either way enjoy the bear meat. My arm isn't healed enough to allow me to go bear hunting this spring