Howdy
We seem to be getting a little bit off topic, but I will answer your question anyway.
I had to dig out all my K-22s so I could give you an answer. They all have a little bit of 'wiggle'. I have no good way to measure it, but they all exhibit a few degrees of rotational play. None have any appreciable endshake, but they all have a little bit of rotational play when in battery. The one in the center, the old one from 1932 has maybe a teeny bit more rotational play, but as I said, it is the most accurate of the bunch. I attribute it's accuracy to its single action trigger, which is the lightest and crispest of the bunch. Frankly, unless you are buying a custom revolver (which I have never done) a little bit of rotational play doesn't bother me. That's what a forcing cone is for.
View attachment 824071
I am a bit curious about your comment about Colts. I don't have as many Colts as I do Smiths, but most of my Colts have a little bit of rotational play too.
This 22 Officer's Model Target from 1935 has a little bit of rotational play to the cylinder, about the same as the Smiths.
View attachment 824072
It is no slouch in the accuracy department.
View attachment 824073
This 22 Police Positive Target has a little bit of cylinder rotational play. It is pretty accurate.
View attachment 824074
Not a 22, but this 38 Police Positive Special from 1922 has virtually no rotational play to the cylinder. But it clearly has been fired very little over the years.
View attachment 824075