I think he meant rubber bullets or bean bag shot or the like. Rounds designed to be less lethal rather than just inapproprate rounds.

Even so, there has been a lot of discussion on the internet about the wisdom of less lethal rounds for self defense.

My take on it is that these rounds were developed to be used in controlled situations by trained professionals (consider police shooting a knife weilding holed up suspect with bean bag shot instead of shooting him outright). It's unclear that this translates well to a self defense situation.

-john