Assailants shot with bird shot in the torso often live to see the paramedics/med techs, then maaybe to the ER, then the OR, then the med surge floor to recover (generally a year-long, excruciating, and messy process that often ends up with colostomy bags and even worse impairments after all the healing is done). Some don't make it off med surge, what with sepsis, clots, etc.
Assailants shot with buckshot or slugs in the torso generally do not live to see a med tech/paramedic, don't make it live to the ER, or the OR, or med surge. That is because they died at the scene. Matter of fact, in a large metro area with beau coup GSWs per year, at the Level I trauma center over a 5 year period, not a single shootee who got shot with buck or a slug in the torso made it to med surge.
Anyways, I would load up with slugs, except my neighbors are too close. So 00 or 000 buck it is, along with an understanding of my home's layout and likely lines of fire.