I recently purchased a surplus Yugoslavian M57 in 7.62x25 Tokarev. Unfortunately, the barrel is so worn, shots tend to fly off in random-ish directions, and I’ve resolved to eventually buy a replacement barrel. In the meantime, the thought struck me that loading shot, especially of BB size (I have a supply of BB lead shot) could make a fairly interesting....experience. Anyone experiment with this? Any thoughts on what I would need to make this work?