Thin internal walls are the norm here where I live. The best home defense is a 12ga 18in barreled pump shotgun with a straight cylinder choke and 8 round capacity. I have my own special low recoil loads with 1 1/8 ounce of #6 shot. I don't advise low powered loads in a semi-auto pistol due to the possibility of a jam. Same for hollow point ammo. This rules out me using my 45ACP for home defense as I use military ball in mine. Also rules out hollow points in a revolver due to penetration and limitation of 6 rounds.