Like I mentioned on a previous thread, the HST rounds are in my opinion the best 9mm self defense ammo available. The luckygunner lab reports show a wide variety of self defense ammo tested. This will give you a much better idea of what's good and what's not. Also it's very important to realize how certain ammo will differentiate from barrel length. One brand may have great results out a Glock 17 but fail to expand in a Shield or Glock 43. I carry a small single stack 9mm and carry the 147 grain HST.

Some will chime in and say shot placement trumps everything. Yes they are right, but why not find the best most reliable ammo to go along with that. You want every edge you can get.

http://www.luckygunner.com/labs/self...llistic-tests/