Originally Posted by GaryGlock
Id look at hornaday critical duty. Very rapid expansion, doesn't penetrate too much.
Check again. Hornady advertises that it (Critical Duty Ammo) penetrates windshield glass, multiple layers of drywall, some thickness of wood ... there's a list according to the FBI's specification for penetration with continued lethal effect.
Quoting their site: "Its large mechanical jacket-to-core InterLock® band works to keep the bullet and core from separating for maximum weight retention and proven terminal performance through all FBI test barriers."
From here: http://www.hornady.com/store/Critical-DUTY-New/
Their Critical Defense ammo doesn't mention penetrating through anything but heavy clothing ... whether it goes through walls, I don't know, but is probably worthy of testing.