I shot an 45 ACP HST +P through three one gallon milk jugs filled with water. HST I think means Hydro-Shock Two. WOW! That thing is a beast. The first two jugs exploded and the round was found in the sand a long way behind after bouncing off the creek bottom. It's all I carry now. Except for Hornady XTP in my wife's LCP 380. It gets good press going through clothing and expanding. In the winter I load her gun with FMJ. It's like stabbing them with an ice pick but it gets through the ski jackets at least. She also carries a G26 9mm when she is in the mood. With HST's in it of course.