Originally Posted By: Robenstein
And if that were true, then 357 SIG JHP would penetrate less than 9mm, as would 357 mag JHP with light bullets.
What I said about +p+ and some +p 9mm loads actually penetrate less is 100% true. And yes, some 357 sig bullets do penetrate less than some 9mm bullets; it depends on the ammo. 357 magnum with light bullets? I've seen as little as 9 inches of penetration with that combo. The bullets fragment terribly. Fast bullets does not equal deep penetration.
A little about me...I'm a quasi balistics expert, have shot more balistics gel than I can count, have been to tons of balistics workshops including shooting through auto glass and barriers. I've spent hundreds, perhaps thousand of hours reading all the latest balistics research. I also shoot a TON and see what works, and what doesn't. I spent $30k dollars last year on ammo alone... Basically I'm a guy that takes self defense, guns, ammo, and balistics very seriously and I usually get it right when I take the time to comment on these issues.