Interesting article showing the continuing effort to improve 380 SD ammo. The HYDRA Shock Deep ammo certainly seems like an improvement over most 380 ammo intended for self defense. However, the author missed something. He refers to the the Shooting the Bull blog testing report which cited that Hornady XTP proved to be most reliable for expansion in gel testing. Fact is that it was XTP bullets on Precision One ammo. That ammo won the contest for the best 380 in combined terms of deepest penetration and consistent expansion in gel testing. It was part of extensive testing done and recorded on videos now in YouTube.
But the XTP bullet lost the crown some time later when the 380 Lehigh Extreme Penetrator ammo was tested. It penetrated deeper, did not,expand as it was not intended to expand, and it penetrated deeper than any other 380 tested. You can watch that test of the 380 XP Here.
I viewed all those 380 tests he did. In the end I adopted them Lehigh ammo.for my LCP II EDC.