While amusing to joke about, incendiary rounds (even where you can legally acquire them at all) are going to open up a whole world of legal issues if used.
For shotguns- the whole birdshot vs. 00/000 thing- a lot of myths out there about one being less-lethal or destructive in home defense-use. Dont buy into em.
I've tested #4, #6 , 00, and 000 at ranges up to 25m on a bunch of typical household construction materials (remains of an old out-building/shop on my land that had been taken down) to include pine framing, sheetrock, steel and wood doors, glass, siding, insulation,etc.
#6 penetrated the least, #4/00/000 all penetrated all materials with ease.
Patterning- open, no choke- even out to 25m/30m never spread more than about the size of my open hand.
Bottom-line- birdshot is still going to punch clean through every interior wall downrange,most furniture, kitchen appliances, doors, windows, you name it- short of concrete and really thick brick. Little Suzie 3 rooms down is still just as likely to have her mellon peeled.
:banghead: