Is it ok to leave a fully loaded mag in the gun ? I've read in a couple of different firearm threads (don't remember if it was here on GT or not) something about how the top shotshell in the mag can become deformed over a period of time from being pressed against the bottom of the bolt carrier,thereby possibly causing chambering/feeding issues. Any S-12 owners/enthusiasts here know if there is any truth to this ? Wanna kill these ads? We can help!