No, this isn't another carry with a chambered round thread :p
I keep my G30 holstered and loaded with a full mag +1. I carry it during the weekend. The Mk40 has daily weekday use due to it's size and ease of slipping into a pocket. So when I take out my G30 to practice dry firing or drawing from concealment, I obviously drop the mag and dump the round from the chamber. Then I put one snap cap in another unloaded mag and go from there. I just rack the slide back half way to recock it.
I've had issues with my DPX rounds becoming "loose" in the casings before from repeated chambering when reloaded my G30 when I'm done. I've since discarded them and have learned a lesson. I am now carrying Ranger-T 230gr +P. When I go to reload my Glock and store it until carry duty for the weekend, I ride the slide VERY VERY slowly and easy to try and prevent any set-back and not let the slide slam shut. I also rotate the chambered round from time to time and check it side by side with fresh ammo. So far it seems alright. I know one or two times isn't going to cause any damage to the round.
What do other people do? I mean, most of us dry fire or practicing drawing from time to time. So what's the rechambering method when reloading without causing harm to the round? At the range I just hit the release and go, but with good SD ammo that's expensive (and Ranger-T is hard to buy with the LE only posted on it), I fear damaging it after repeated chambering.
I feel like I'm rambling... Which reminds me, I need to buy my DPX rounds :)