I know they say good 147gr does fine even at such slow speeds, like 825-900fps (and I'm a HUGE fan of 147gr out of 4+ inches barrels), but for the Shield I'm using 124gr Federal HST. I may go to all 147s just so I can buy one ammo for the Shield and G19: if so, it would be HST or Ranger-T
Personally, I have a few cardinal rules of ammo:
a) I don't buy any ammo unless it comes in 50rd boxes; the 20rd ammo is priced at a ridiculous premium in the hopes people will pay it and assume it's the best--but at the moment, you can still get equal or superior stuff for less (Winchester ranger, federal HST, Speer GD, etc.). Hornady is hot at the moment, and seems to do well--so if I found 25 for $15-$16 I might get it...if I couldn't 50 get HST for $26-$30.
b) I don't use +P ammo For CCW because I don't think the extra speed offsets the slower follow-up shots. If I had time and money to practice with a bunch, maybe I'd use them; at SD ranges of 3-8 feet, I just don't think the extra fps (how much is it in a 3" barrel) will matter much.
That said, in .380, it's gotten hard to get 50rd boxes and/or testing has shown that some of the best rounds (CD and GD) only come in 20-25rd boxes. Thankfully, there are so many 9mm buyers, the price-scam hasn't been fully embraced by all makers (though it seems everyone is testing the waters).