I have both a 317 and 63. The 63 has never had problems after one visit back to S&W to fix an incorrectly installed barrel. The 317 will get a little sticky to eject after about a hundred rounds. I found the hotter the 317 gets, the more sticky it is to eject. When I put the 317 down to cool off and shoot the 63 for a few hundred rounds or so, until it is too hot to handle, the 317 has cooled down and works fine. In other words, stainless 63 gets hot and works fine, alloy 317 get hot and then is sticky to eject. I think thermal expansion of the 317 alloy is causing the stickness. This isn't a problem because for the 317 self defense back up gun, the first eight are all really care about. The 63 is a range gun and I only stop shooting it because it is too hot to touch.