I shot a box of the 150gr HST yesterday with my Shield 9 and I was really impressed, the recoil is very mild even compared to the 147gr HST I shot as well.

What impressed me the most was how much my Shield like them as far as accuracy, it's the most accurate I've shot out of my Shield great groups at 7yds and nailing the 10 ring.

I was already sold on HST but did not know for sure what weight or pressure but with my own shooting experience with them and a ballistic test by Lucky Gunner I will link below I'm sold on the 150gr and my short barreled Shield.

http://www.luckygunner.com/labs/self...tic-tests/#9mm