Thanks for reaching out Larry! I recommend the same ammo I keep loaded in the shotgun under my bed: 00 buckshot. Its range isn't as far as a slug, but its wider area of effect gives you a greater margin of error during a high-stress scenario – plus you're not covering several dozen yards during a home defense situation, anyway. 00 buck is what the cops use out in the field, too. I believe Federal's Tactical Law Enforcement 12 Gauge ammo is the very best on the market for home defense, which is why I'm happy to say we currently have it in stock by the box and the case:
luckygunner.com/12-ga-2-3-4-00-buck-federal-law-enforcement-flitecontrol-wad-5-round
luckygunner.com/12-ga-2-3-4-00-buck-federal-law-enforcement-flitecontrol-wad-250-round