My dad saw quite a few injuries from people using powerbelt bullets. I have seen a few myself. I'll agree they are in the top 5 of accurate bullets on the market for muzzleloaders, but in terms of terminal performance, they are well in to the bottom of the list. In my opinion anyway. I've just seen a few for myself but have heard many horror stories about shoulders blown apart with little to no penetration. One of the one's I saw for myself, the guy hit a very nice buck at just a little over 50 yards. Buck was quartered away a little bit. He hit it right dead in the pocket. We lost blood at around 40 yards. After 2 hours I jumped the the buck and put a 275gr maxi through it's neck. On field dress, we noted his absolutely perfect shot looked like a grenade had went off under the shoulder but not a single hole in the cartilage of the ribs. Sorry but just accuracy in a bullet does not a hunting bullet make.