Drywall, insulation, plywood—what exactly do these materials and combinations of them do to the terminal ballistics of premium defensive bullets?

As someone who owns a handgun and is willing to take action to defend you and yours, you’ve certainly given thought to the possible consequences of firing that gun within your home. There are many premium handgun bullet designs that will give fantastic performance through all sorts of media.

But what happens in the event of a missed shot in the home?

I was intrigued to see what these premium bullets would do in a few “real-world” environments, such as an interior wall with studs or an exterior wall with drywall, fiberglass insulation and plywood exterior.

Do certain materials cause different behavior?
Will the premium bullets whistle through a door with enough apparent energy to wound, maim or kill?
What will it take to stop a handgun bullet?
What effects do caliber and bullet weight have?
While my testing was the “rudimentary/backyard” style instead of some controlled laboratory environment, it’s real … and there were some informative and eye-opening results.

https://gundigest.com/article/terminal-ballistics-shooting-through-walls