Naw...I don't want to lug around that much weight in a carry gun...not to mention a spare magazine. That's why I carry an aluminum framed six shot revolver.
At the range I'm in no hurry to shoot up my ammo, so when I did own semi auto with 13-15-17 round magazines, I never bothered to load them to full capacity anyway. I'd load five, shoot five...load five, shoot five. Fill those 17 rounders up, and I was on the way home in a hurry.
That doesn't mean I support restrictions though.
For God so loved the world, that He gave His only begotten Son, that whoever believes in Him should not perish, but have everlasting life.
John 3:16 (NKJV)