If someone breaks into your home 6 bullets are enough [?] ... Well if its a one of I would argue that I still my need more round for even just one person.
@phoenixrising ...
Not to pee on your parade, but a short-barrel shotgun with "00" 3 inch magnum buckshot will more than spoil the day of whoever wants to enter your house. You might as well take out more than one of them at a time with buckshot.
Another option is to get a Federal Automatic Weapons permit and build a salt box / machine gun nest inside your home. Put on your uniform and helmet and blast away as the enemy enters.
If some try to sneak in from behind, have a few grenades to throw out to cut down the enemy resistance.
Just thinking about the safest approach.