If a .22 is the best you can use, then it is better than a shovel but I would use the CCI shotshells. The only thing I ever used .22 crimped shot on were mice in the barns with dirt floors when I was a kid. But I'm with the bigger is better crowd. Both copperheads that I've dispatched here in the city where I live, plus the rat I knocked off our chain link fence were with my Ruger Blackhawk using CCI .38 shotshells. It's just that I would want to put more lead shot than a .22 packs downrange at any critter than can shoot back.
CW