I find those bullet really funny, they had them on CSI: Miami a while back making them sound like they were not only frangible to go through clothing but bullet proof armor only for the frangible to expand and shred one of the people on the show. Of course they put the whole "omg cop killer bullet" spin on them.
I wouldn't be surprised if the Brady Bunch tried to ban those.
The price for them seems to be a bit much...
45 ACP Air Freedom Rounds
45 ACP 125Gr. Air Freedom Round (20 Round Box) $51.43
45 ACP EPR
45 ACP 185Gr. Enhanced Penetration Round (50 Round Box) $107.67