I don't know much about much and have no where near the experience as the majority of the fine folks on here.I can relate to the low left hits from my Shiled. Here's my first time out with it
Look familiar ? I knew it was partly(mostly)me since I haven't shot a handgun in many years and knew I needed to work on grip and trigger squeeze.Got some good advice from folks and worked on it and still on other outings not much improvement
I wasn't thrilled with the sights that came on the gun and had some AmeriGlo I Dot sights put on and I noticed before having them installed it appeared the front sight was off center to the right. The Gunsmith confirmed it when installing the sights and he asked me are you hitting Left ? and I said Yep.
I also got the Hogue Handall Jr. grip because of the slight palm swells. Even though I have small hands the thicker grip helped with my grip and also gave me a much more solid and secure feel in my hand.
Here's the last time out(the first hits were the hits to the left and after a very small tweak with my grip and trigger finger placement --- well the results speak for themselves

This is at 7 yards 50 shots fired.
Sorry for the long winded post,but sometimes the gun needs some tweaking and not just the shooter.I know I am still a work in progress but it's getting there