9 or 40?
I run an XDm 40 with extended basepads that will allow me to load to 20, possibly 21. However, when I do load to 20, I find that I can have a couple of issues:
* wrecks my mag spring
* mag doesn't fully seat if slide is closed (due to spring compression issues)
So -- what happens if you only load to 18 or 19? Any issues? Or even 10 rounds? Any issues?
I suspect that the mag may be too full, which isn't allowing the mag catch to be fully engaged. Recoil then kicks the mag out.