I didn't know that .22s were picky on ammo- I've never owned a .22 revolver.
They are; and in my experience, this issue is not confined to the K-22 revolvers. I have .22 rifles that have brand preferences as well. This is particularly an issue with semi-auto rifles. Some of them demonstrate ejection problems with one brand, while functioning consistently with other brands. Accuracy is also often related to brand.
Of the K-22 revolvers that I currently own, one shows a strong preference for Remington brand ammo, while another likes Winchester and dislikes CCI. You just have to do some experimentation with each of your rimfire guns.
Sounds like I should focus on the 17s and leave the K-22s to the experts . . . Any other thoughts to help me "zero" in on the right one?
I don't know about the first part. If you find a decent K-22 from before the model number period, I don't think you should hesitate to pick it up. Of the several I've owned, none has been problematic.
As for helping you "zero in," I'd suggest you keep an eye out for a Model 17-3 in the on-line broker ads or in local shops. These seem to show up more often than other dash numbers (they were manufactured for 10 years at a time when S&W sales were brisk) and can often be found for a reasonable price.
The one best piece of advice I can give you in terms of function, is that you diligently clean the charge holes in the cylinder after each trip to the range. Extraction problems most frequently develop as a result of buildup in this area.
One more thing. Saying K-22 in opposition to Model 17 is really a false distinction. All Model 17s are K-22s; but not all K-22s are Model 17s. When S&W started using model numbers, they did not drop the model names, they simply
added the model number. So, beginning with shipments in early 1958, the K-22 Masterpiece became the Model 17 K-22 Masterpiece.
Good luck!