[Shooter 2.5]

Especially with internal side panels. I have a tape where car doors are hit with a variety of cartrdges. It wasn't a very good test. The larger calibers were shot near the locking mechanism and the smaller calibers were near the bottom of the window frame. The smaller calibers went through and through and the .357's and .45's were stopped.
A better test would be to use the same gauge steel with the interior upholstery.

Someone will have to call "MythBusters".

[taxcontrol]

Back in my high school days, my neighbor had a hobby auto/sheet metal shop in his back yard. Just for grins, he used a car leaf spring to make a 400 lbs pull cross bow. He then tested it by firing a sharpened pencil through a car door.

We learned two things that day. 1) even though pencils can penetrate a car door, there is not much left afterward and 2) 400 lbs crossbow tend to tear up the 4X4 used for the stock.

Great fun for about 10 min though :-)