Not to add fuel to the fire, but has anyone confirmed for sure that the Air Marshalls ARE using the .357 Sig, or is it just hearsay?
If so, what load are they using?
A 90gr bullet designed for .380 velocities, for instance, might tend to UNDERpenetrate when pushed at .357 Sig velocities...
...or it may just penetrate 10" or so with a ton of authority. Probably not gonna over penetrate. The "laws of physics" argument only has merit if one considers ALL the variables, including bullet weight, design, and expansion at impact velocities.
You'll probably never NEED a gun. I hope you never do. But IF you do, you will need it worse than anything you've ever needed in your life.
IF we're not supposed to eat animals,
howcome God made 'em outta meat?