Decided to take the G23 to the range tonight. Ran some 165gr PMC FMJ's like I usually do since it's the cheapest the range has. Decided to try out some of my new Botach mags that I ordered as well. Fire off some rounds, and have one fail to fire. Hmm. That's odd. Never had that happen (w/ my G23) before. Eject round. Finish off mag. Forget to check which mag it was that the failure was on (doh!). Fire off some more rounds. In the middle of a mag, I notice the gun kind of make a 'pop' sensation. Didn't think much of it, but as soon as I pull the trigger again, I get another fail to fire. Now it's got me thinking something isn't right. 1 round, ok. 2 rounds, that never happens. Check mag, and it's one of the new ones. Finish off my ammo, wrap up, and head home. Now, I'm not the most anal person about cleaning my Glock. It might get cleaned every 3 range trips. I've been using the same method, and mostly the same solvents/lubes for the gun's entire life and never had a problem before. But, I won't rule those out. My thoughts on two possible causes: 1. The new mags I ordered. I'm not saying these are the cuprits just yet, but it's something I'm going to keep an eye on. 2. I use (lightly) this teflon grease shit on the slide rails and most of the contact points in the gun. Now, I know I shouldn't be using a grease on the gun, and have been meaning to switch to a dry lube (probably will immediately now) but I've never ran into an issue with it before. I'm thinking maybe it's gotten gunked up and isn't allowing the gun to fully return to battery. No, there's no grease in the striker channel. Pic of rounds, fired round for comparison: Any other thoughts on what might be causing this issue?