I have owned and used the 6" K-22, 4" Model 18, and 2" Model 34. All are excellent for different purposes. They have all been more accurate than my shooting is likely to be. As long as I do my part right these revolvers will do theirs.
If I wanted a .22 for target shooting or hunting I would lean toward the 6" K-22 or 4" Model 18. I love the Model 34 on hunting, fishing, and camping trips, and I've forgotten how many meals it has provided for me with grouse, cottontails, or snowshoe hares. Carries easily in a vest pocket, and a box of .22LR rides easily in another vest pocket, so I know I'll never have to starve to death in the woods.