Not trying to start anything, just really curious. If you are talking about a S&W 625, wasn't it designed for factory loaded .45acp? And isn't a 165 pf actually a fairly mild load in .45acp?
I can see not wanting to shoot .357Mag full time in a K-frame, but that is the only S&W I recall hearing would suffer from shooting the ammo for which it was chambered.
--Lin