Both the Colt and S&W have pedigrees, but I would bet you'd see quite a few more K22s in their day than Diamondbacks for shooting bullseye. My dad has an old 4 screw K22 and I bought one of the first M17s when they came out with the full length underlug (aka: 586/686). My M17 is immaculate and very accurate. I just don't shoot revolvers as much as autos anymore.