The Marshall and Sanow data is not scientific and should be taken with a grain of salt. They won't let anyone else review their data, don't explain how the data was collected, and don't tell you the sample size. For example, how often could Triton 380 acp jacketed hollowpoints have been used in shootings? That is a fairly obscure load from a fairly obscure ammo maker. There really can't be that many people walking around with that load in their gun right now. If the 70% number they are quoting is based on a very small sample size, it may not accurately reflect the real stopping power.
I assume the penetration data you are giving is from gelatin and not human tissue. Was this bare gelatin, or was it covered in clothing. This time of year a nice thick coat can really screw up hollowpoint expansion, and significantly limit penetration.