Incorrect.
GoldenLoki.com
Even when fired from the stumpy barrel of a P3at, the Cor Bon 90 gr JHP (13.3") and Speer Gold Dot JHP (12.6") exceed the minimum 12" penetration standard. All expanded reliably as well.
One could presume that when fired from a pistol with a longer barrel, that the performance improves even more.
Personally, I like more penetration, since the desired depth is 15". Thus, I use FMJ-FP in .380, which get 16-17".
If you are going to make such statements on this forum to a newbie (based on number of posts) then please support your assertions with some facts.

