The measurements of K frame, Colt Detective Special, Ruger SP101, and the J framed .357 magnum guns have been done time and time again by the gunwriters and shooting instructors. The difference in cylinder circumference and the frames of the different types isn't as great as one would suppose. Granted the K frames are slightly larger in most areas, but not by much and not enough to make a big deal about.Some probably will. This does make the K framed and similar types a bit harder to hide.
A few tenths or hundereths of an inch here or there isn't going to get argued over.
Since I have a hard time hiding a .357 maggie in a pocket I chose to carry the 65. Shoot better with it too.
I do like the Taurus 605 and the 600 and 800 series revolvers. Just never had a need personally to have a 5 shot pocket cannon when the 85CH I have does a wonderful job.
There are those who can utilize the magnum power and versatility of the pocket rockets. My hat's off to those who go that way. I've just got it covered a different way than others do.