Combat, that sounds like them. They didn't penetrate very far and the plug didn't come out so it created very little damage and blood loss.
Here's some I have. The Omni-shok's, on the left and in the front case, are supposed to expand with petals and create large wound channels. I forget the name of the others but they were supposed to be good for shooting out car tires. They are very light and don't appear to have any lead in them. They are in a belt buckle that holds six rounds of .38/.357 ammo.