For anyone still interested in this issue I came up with a solution for me. I tried different mags, sanded the ones I have, looked for interference points with markers, etc and nothing really worked. I don't have large hands and to reach the mag button I have to stretch my hand around the grip which put pressure on the grip and would make the magazine bind. If I pull my two middle fingers back (3/4 to 1") to the side of the grip, opposing the button, I can push the button harder without compressing the grip and all my mags now fall free. The palm of my hand doesn't slide around the beaver tail when I do this so I'm still in position once loaded to shoot. It's not a natural thing to do for me, but after practicing it a few minutes my stuck mags went down to very few. Hope this helps someone.