Sounds like she needs to work on her shooting skills. While I don't support any sort of mag cap laws, I think that the most restrictive mag cap limit is 7 rounds. That is, you cannot have a mag that holds more than 7 rounds.
If you have 2 home invaders and 7 rounds to use, and the distance between gun muzzle and target is probably 10 ft or less, then 7 shots ought to be plenty. If she had chosen a revolver she would have only had 5-7 rounds (possibly more with a .22 revolver depending on what she has).
So it sounds to me not that the mag cap law caused her beating. It sounds line she was unable to neutralize the threat due to her poor shooting skills. Think about it, if she could not take out 2 perps with 7 rounds, then another 7-8 rounds may not of mattered anyway. She was most likely just pointing her gun, closing her eyes and pulling the trigger as fast as she could. Clearly she lacked training and/or clarity of mind at the time of the attack.
I am with you 99.9% of the time, 2aguy. This is the 0.1%.