I've been using C&S extended firing pins in several of my revolvers with zero problems, but so many guys bad mouth them around here that I got nervous, so ordered some from Apex Tactical. They arrived, and I just ran 100rds through each of three guns with lightened springs that were not reliable without the C&S replacement. Functioning was 100%, so I now have enough faith in the Apex pins to install the rest. Here's a pic with the stock .495 on the right, Apex .502 in the middle, and C&S .508 left. The Apex works so well I guess the extra .006 isn't necessary.