Loaded up some Hornady TAP 147gr 9mm JHP rounds, brought out the Clear Ballistics gel (calibrated to manufacturors specs), grabbed my SIG P6 (3.9'' barrel), and the video camera and here's what I found.

Chrono Data:

-971 fps, 308 ft/lbs energy

Results:

-20.5'' penetration

As you'll see in the video below, the round failed to expand but did tumble in the block.