I have been doing some reading about different types of ammunition for personal defense, and stumbled across some articles and forum posts about frangible ammunition for situations where over penetration can cause serious problems.
I live in an apartment complex that seems to have pretty thin drywall walls, and while I pray that I will never have to use my firearm in the apartment I like having the option in case a situation does come up.
From what I have seen there are almost as many kinds of ammunition as there are guns!
One popular type I have found is Glaser Blue Safety Slug
73103 - 9mm Luger +P, Glaser Safety Slug Handgun Cartridge, Blue, 80 Grain, 1650 Feet Per Second, 484 Muzzle Energy, 6 Pack
I have also come across Mag-Safe and a few other manufactures.
What 9mm round would provide decent stopping power and a reduced risk of over penetration in an apartment?
Here are a couple of articles that got me thinking about this topic
Accidental Gunshots Vex LAPD - Los Angeles Times (near the bottom it talks about an apartment incident)
XD Accidental Discharge - XDTalk Forums - Your HS2000/SA-XD Information Source!
http://www.officer.com/web/online/Top-News-Stories/Boston-Officers-Accidental-Discharge-Pierces-Girls-Bed/1$29231