Tactical home defense shotgun questions

[Biggun4214]

Pump is less likely to have a problem. I believe the 12 vs 20 would just be a personal preference. They say the best home defense load is bird shot. It is deadly in the room, but wont go through walls and hurt people in the next room.

Growing up I knew a man that accidentally fired a 410 in his living room. The shot load went through a wall, an oak headboard, and shattered a mirror on the other side of the bedroom.