Most firearms are designed to operate best with a certain style magazine. Like your 1911 and the 7 round mags. The high capacity magazines usually are more trouble than they are worth.
My Springfield Armory XDM 9mm uses 19 round magazines. It works flawlessly. My Yugoslavian AK-47 has never, ever misfired, had ejection issues or failed to feed the next round reliably using a 30rd Bulgarian surplus magazine. I have never once thought that high capacity magazines were any trouble at all. YMMV.