I've shot 22 snake shot quite a bit at stuff to test for effectiveness, penetration, and spread. It will definitely tear some stuff up. I'd get whatever revolver you feel like owning, either would be effective. 22's can be had in 9 shot, 38's get more pellets. Judges are heavy. If your just packing it around for the occasional snake, a 22 is great. If you feel like you might encounter something like a wild dog or even a man-sized preditor, the 38 may be a better choice. Load it 1/2 with snake shot, and 1/2 with slugs. Little 5 shot J-frames carry great, and even a 6 shooter isn't hard to bare. Of course, you want to stick strictly with revolvers, for shot rounds. They won't cycle a semi, as said before.