We really only know about bullet failures that killed the animal and it was recovered. I've seen 240 XTP's fail miserably on deer too but like I said, it killed the deer and I recovered it. I'm in agreement with Whitworth that a bullet that comes apart fails but others would argue that if killed the animal then it didn't fail. One can only argue with that logic so much. It's sort of like the term, "overkill". I've never seen anything that was overkilled if actually killing it was the objective. I would rather practice with XTP's and hunt with Swifts or Barnes.