I like the 147 grain 9mm. My agency has issued it for 20 years without a failure of any kind that I'm aware of. I read all the shooting reports, so I'm pretty sure
A friend of mine shot a guy with an early generation 147 grain Hydra-Shok. The bullet went through a car windshield and hit the bad guy in the upper lip. This weak, useless round then plowed through the gent's face and into his brain, killing him instantly.
One thing the 147s do is penetrate. I would be very skeptical of a report of a 147 grain 9mm falling out of an entrance wound.
I remember a shooting involving the Hazelton PD (not sure what state) which generated a lot of misinformation regarding some .40 cal rounds which supposedly only penetrated an inch. I've read the followup report of that shooting where it was determined the rounds only an inch under the skin had actually penetrated from the other side of the body.
The funny thing about the 9mm 147 is that if you take that same bullet, launch it at the same velocity, but load it in a .38 Special case headstamped +P+ it becomes the hammer of Thor, suitable for use only in N-frame Smith and Thompson Contenders!