I recently picked up a S&W model 60 and i'm experiencing light strikes on my CCI-primered reloads with about a 60% FTF rate in DA (they always fire on the second strike). Haven't tried SA as my M60 has a bobbed hammer so not easy to do SA. No problem with factory loads, and my CCI-primered reloads work fine in my Model 10's, so seems to be a combination of CCI primers and my M60 not getting along.