On the topic of most rounds penetrating walls and such a shooting took place out my this last Thurs. Two shooters stood outside a home and shot into the house just before 1 am. Two different caliber handguns were used. The rounds penetrated through the exterior wall of the house, through the interior sheetrock, across the room and through another interior wall, where one bullet struck an 11 year old boy sleeping in his bed.
At least one of the rounds that penetrated the exterior and interior walls was a jhp. An officer I know has told me that 9mm and 40 S&W bullets but no statement on the caliber has been released yet.
http://sanfrancisco.cbslocal.com/201...ot-in-oakland/
http://www.sfgate.com/crime/article/...ll-3884759.php
This type of shooting happens around here a few times a year. Last year an 8 year old was hit by a stray round from a shoot out across the street. The 9mm jhp passed through an exterior door and an interior wall before striking a boy at piano practice.
The same year a woman was shot when the bullet passed through an exterior wall of her apartment building, an interior wall and hit her in the head as she lay sleeping.
None of this ammo was anything "fancy" store bought off the shelf stuff.
tipoc