I'm in California. 30-rounders are illegal here. Reloading is just a minor distraction though, the 10-round limit is just something to make tree-huggers feel like they are making a difference. If I were to decide to go off and I didn't have any high-capacity mags, it would take me less than 1 day to get them. That includes the AR and 9mm pistol. If I were to go off, I wouldn't care anything about the "laws". It's all a moot point though as I wouldn't feel the need for high cap mags. A person can do nearly the same damage without them.