I have a 3” 317. It had a slightly uneven barrel-cylinder gap and the gap produced a jet that eroded the face of the cylinder. Everything else was fine, but after having this happen and sending the gun back to the factory a couple of times, they replaced the barrel and evened up the gap, and replaced the cylinder with a stainless cylinder. It picked up about 3.8 oz. in the process. I prefer it this way. It actually shoots quite well, but it is more difficult to shoot well with the very light weight.

__________________
Tom