What's the bag limit?

Senator Diane Feinstein, (D-CA) recently observed:

“We have federal regulations and state laws that prohibit hunting ducks with more than three rounds, and yet it’s legal to hunt humans with 15-round, 30-round, even 150-round magazines”

Yep. She said that during a Senate Judiciary Committee executive business meeting, on March 7.

Does that mean that James Holmes is being unfairly prosecuted? Did he simply exceed his bag limit? Was he 'hunting' out of season? Perhaps he had a 'does only' tag?