I shot a grouse with my .454 Casull, I was helping my inlaws check on some cattle up on their ranch. We spotted the grouse, and I asked where the 22 was because my father in law always has a 22 handy in the truck. So the only weapon we had was my pistol that I brought along to tests some new reloads out. I figured it will ruin some meat, but its bullets are jacketed, and only a starting underpowered load. I was sure it wouldn't expand or do mush damage. WOW was I wrong, the grouse was about 20 yiards away at the shot and seemed to just explode! I still don't think the bullet expanded but even going at a modest 1300 f/s, it turned that grouse inside out.