Good morning, Mas: Based on both your experience and what you have heard from various Police depts.--What 40 caliber ammo stops the BG effectively? Does bullet weight effect how quickly (with good shot placement) a BG is stopped! Mas-the internet is full of infornation but unless your in law enforcement and see the effect of an ammo -you really can't trust all opinions because some of it is not true! Please recommend to me a brand & weight ammo that you have heard good things about! This ammo will be fired out of a Sig 229 for home defense! Thank-you Mas-Now for another cup of Java! Sincerely Mike-USMC vet.