Hi All, First time gun owner here - I've started with a gen 3 G19 and love it! A couple of probably silly questions: 1) When cleaning it I noticed some moisture/lubricant/solvent in what I think is the firing pin channel at the rear of the slide. It is down in the groove located behind the round pin. I was going to take a q-tip to it but didn't want to remove it if it was lubrication from the factory. I may have inadvertently gotten some solvent in there but would think that would have dried out. Any advice? 2) Out of 230 rounds down range or so I've had 4 or 5 shell casings land on my head. No FTE, no FTF just a few that didn't come out sideways. It is not a major issue but I'm curious if this is a common experience. I was using 115g FMJ. I've read the many threads on BTF but there doesn't seem to be a consensus on possible causes. Maybe that is because there are many reasons In any case, I'm really enjoying my range visits and even dry firing to work on my grip, trigger pull and stance. I hope I never have to use it but do feel better having a firearm in the house for protection as well. Great forum and thanks for any insights.