I was shocked that it would equal my DW PM-9 target gun, with factory defensive ammo no less!
That's an impressive group regardless, but HST seems to be an accurate load all around in my experience. I can't do it justice.
O/P, I've shot all weights and loads from USPSA gamer (spider fart 147s) to Ranger T +P+ out of mine and it's never bobbled once. I don't recommend the +P+ as it's a real handful and pretty hard on the gun, but +P I'm not afraid of shooting in the Shield. I carry +P 147HST in it almost exclusively. I have well past 1000 rounds now (mostly 115 handloads in practice). It's a gun you can actually shoot and not just carry a lot.