I load 45 colt and 38/357 shells with 00-000-pellets and sometimes a mixture of all the mentioned. And a few items I wont mention due to the liability factor for some dildo this and trying it at home.
They do make a fine bush/snake/Jehovah's witness round.
Plus they are fun as crap at the farm/range with soda cans. It rips them to shreds. Snakes and cans that is.
They serve a purpose as far as backpacking or woods travel for snakes, unless you are a perfect shot like some here are and can hit a snake between the eyes at 15 yards between the eyes with one shot, on a hill, in high wind, in a quick draw, with a pack on shooting between two people.
Otherwise they are just fun as hell to load and play with at the range.
You would be very suprised at some of the loads we have come up with to shoot out of my 454 Blackhawk.