I just bought 40 rounds of these! Two boxes of Speer Gold Dot 165 gr. .40s. http://www.youtube.com/watch?v=JF7U9mBQQWk&feature=search It isn't the most scientific test, but if you look at the other tests he performs, the other HPs don't penetrate this much. I also saw this test, which seems to confirm that these over-penetrate. 16" after heavy clothing, the entire length of one gelatin block. That's a bit deep isn't it. I noticed that the ATK test personnel did NOT say that this ammo met FBI specs as they did with the other ammo that they tested Go to the pistol ammunition video, about 8:38 in: http://le.atk.com/general/irl/videos.aspx Wanna kill these ads? We can help!