http://www.theboxotruth.com/docs/buickot2.htm PLEASE DO NOT START A CALIBER WAR IN THIS THREAD. My disclaimer: Over the the last year Ive gone back and forth between wanting to keep my .40's, or swtich out to 9's. Even my recent 26 vs. 27 test left me thinking that I may swap out in the future, but am going to hold off for the moment to fund other stuff. I say all of this so that nobody thinks Im attempting to rail on the 9mm, as I may myself be using it within the next year. PLEASE DO NOT START A CALIBER WAR IN THIS THREAD. With that out of the way: The link posted got me wondering. The .40 goes all the way through the seat, the 9mm doesnt. I have no intention of shooting through a windshield anytime soon, but got to wondering: Wouldnt this same logic of not being able to go through the seat be applicable to heavy clothing, muscle mass, etc.? Is there something about a winshield that makes this scenario unique compared to other those types of surfaces? Of course over penetration could also be a consideration here. PLEASE DO NOT START A CALIBER WAR IN THIS THREAD. Thanks!