I keep Federal HST 147gr in the M&P 9c. They shoot fine, as does literally everything out of that gun that I've put into it. Now the 147 grain Federal HSTs have expanded extremely well in ballistics gel tests I've seen with this specific model gun. Not sure if they will reach expansion velocity out of a 3.1" barrel. It's possible. Would have to go see whether anybody has tested. Some (many, I think) 147 grain JHPs are just not going to expand at the velocities you get out of a short barrel, especially if the bullets are designed for duty-size guns with any kind of barrier penetration.