Overpen is overrated. Anything that is competent for self-defense can also over penetrate. Going the other direction is more dangerous.
The Box O' Truth Hurts - All Weapons Have Limits Inside the Home -
Previously, I have penned numerous articles focusing on testing various firearms in use throughout a home. Most testing has been completed using drywall, but that is about as realistic as using ballistics gelatin – that testing simply fails to capture the complexity of most structures including...
www.thefirearmblog.com
The Box-o-Truth! Penetration tests
This is pretty cool, just some informal testing of various calibers on sheetrock, wood, and brick (what's that bullet going to do after you shoot the dude in your living room?). He also tests several weapons on bullet-reistant glass, and on padlocks. Enjoy. http://www.theboxotruth.com/
www.martialtalk.com
The Box O' Truth #1 - The Original Box O' Truth
This is the Box. Having some time for study of this fascinating sport, I built the "Box O' Truth". The purpose of the Box is to test the penetration of various rounds. People often say, "I think...". "I suppose...", "I bet...", when discussing facts like penetration of ammunition. There is...
www.theboxotruth.com