Yep. I've had two revolvers "shoot loose" on me over time, one being a S&W. I sent it back to S&W and they repaired and re-timed the revolver for a nominal charge, and fairly quickly, too.
FWIW, I have found that my truly heavy loads (eg, 300 gr LBT @ 1325 fps, a "Linebaugh" load)that are manageable in one of my Bisley's are intolerable in my 625 Mountain Gun. The heaviest loads I run in any of my N-frames are considerably below that threshold... in 45 Colt, ~270 gr cast bullets running at ~1100 fps.
