Good -OK- fine, freeping on the fly.......Are these NEW S&W's ?? I see the little-gator safe lock hole above the cylinder latch. ?!?!?!?
Too much torque during barrel install maybe ?? Sabotage at the factory ? A dumbass that doesn't know how to use a floating beam wrench maybe ?:o)
That's what I figure. Perfect place for a stress riser.
Could also be some local "expoit" tried to regulate the fixed sights by doin' the ol' tire iron through the cylinder window to get that barrel over just a tad.