re: What size shot for home defense?

There aew some really good videos on YouTube. I have concluded that #6 or even # 7 lead 2 3/4" 12 ga or #2 steel 3" 12 ga is sufficient at nl room distances is sufficient through clothing and reduces the chance of overpenetration injuries in adjacent rooms.

Buckshot will simply go through clothed person and wall behind them with enough energy to harm others. Certainly would be effective but collateral damage is concerning.