If they're dragging in the grip when you pull them, pinch the sides together SLIGHTLY.
As far as stripping rounds, by hand I assume, @ajole is spot on. Empty them the easy way, reload, then rinse and repeat. Leave them loaded when you're done, and/or grab a pencil or dowel rod and work the followers up and down to break in the springs whenever you have a few minutes of downtime at home.
I "tweaked" mine and they run very well. No problems from the mags in years. BTW. I had run three of them in the pistol for a few years and then ordered 2 new ones for the carbine. the new ones definitely needed to break in and be tweaked to run as well as the older ones.