If 5 rounds isn't enough you better carry an AK. Sorry but it isn't like in the movies where 10 bad guys can't hit one good guy standing in the middle of the street, but the good guy kills all ten bad guys that are running or have cover.
I stay out of high crime gang infested areas so I figure my LCR 5 shot 357 will be enough. If it isn't then I will probably end up dead anyway. This isn't the movies.