Here's my down side thought. It would still be considered a crime involving a gun. That could open you up to losing all your gun rights. Then you're wide open to any guy with a high powered pellet gun, or even a screw-driver for that matter.
You can't win for losin'.
Further, if you're of a mind that you could be involved in a shooting with an idiot and all his buds, are you going to stick with a 7 shooter?
If you do break the 10 mag limit, then you're in breach of a second law, and one that expressly forbids the gun you were using. That's considered a serious crime in and of itself.
To your first point (and I’m no lawyer) I believe to lose your gun rights it has to be at least a “serious” misdemeanor, not an infraction. But subsequent offenses could be a misdemeanor. An “imaginative” DA could try to say each magazine is a separate offense, and count a second mag as a subsequent offense, but I don’t know if it would fly.