ammo

from : http://www.ar15.com/ammo/project/Self_Defense_Ammo_FAQ/

from: http://pistol-forum.com/showthread.php?4337-Service-Caliber-Handgun-Duty-and-Self-Defense-Ammo

from: http://www.examiner.com/article/what-is-the-best-shotgun-ammo-for-home-defense

from: http://www.hhshootingsports.com/WireShots/archives/8182

from: http://madtownpreppers.blogspot.pt/2012/10/extreme-home-defense-part-5-home.html

from : http://mygunculture.com/what-has-more-energy-a-3-%C2%BD-12-gauge-buckshot-load-or-a-throat-punch-by-mike-tyson/

from: http://www.thefirearmblog.com/blog/2008/11/16/hornady-critical-defense-ammunition/