Goodness gracious. There's a big difference between a 2.5" k-frame and a snubby j-frame! The latter doesn't lend itself to enjoyable full power load shooting.
Where did I indicate that my bud's pistol was on a K frame?
IIRC, it was a M60, which S&W "counts" as a J frame. Note that I said his little 357 wasn't much different dimensionally, from my M36. I believe the M60 weighs less than 4 or 5 ounces more, than my old M36?
I've had a 4" M686 since they were introduced and can shoot that rascal all day, with my relatively hot 125gr HP reloads. Similar loads in a J frame? Entirely different matter.