I saw the movie Shooter over the weekend. I know, seriously behind the times. If I am not the last gunnie to see it, I thought it was pretty good, and worth watching.
In one of the scenes, the main character takes a shot at a a can of Dinty Moore stew from a little over a mile. Judging from the range, he must have heard of some previous experimentation done by a friend of mine. In case you are wondering, introducing an ounce and an eighth of #4 lead shot at about 1300 fps into a can of Dinty Moore stew at point blank range not only causes a sudden increase in pressure in the can, it also creates, if only for a moment, a single point of exit aimed directly back at the shooter. In such a case, distance is your friend.