I've got two 329PDs and both suffered significant erosion from gas cutting on the face of the cylinder. S&W replaced the first one twice before I sent it in the third time and begged them to put a blackened stainless steel cylinder in, which they were good enough to do under warranty. Gained a fair bit of weight, but still OK for backpacking and is my main carry gun for the back country. But the gas cutting was ridiculous--even using ammo within the specs given, one of the cylinders was badly cut with less than 30 rounds fired. The second one still has the titanium cylinder and moderate cutting; just gave up and left it that way for when I want maximum lightness and don't anticipate firing unless emergency. I'd say they titanium is simply unfit for use at the .44 mag level.