I'm definitely not using this as a tack driver or range gun. I just don't feel confident to reliable to be combat accurate from 10y with this. again, i think its largely the grip, I just feel like the gun slides around due to not having enough real estate to grip. i'm going to try and find a hogue or talon grip and see if that helps
Houge grips enabled me to make dramatic improvement with my sig p938.
Another thing that has helped me with my p938 is something I never do with any of my other guns, at all: Instead of having my finger in the middle of the trigger, I do my press from the top of the trigger, with the top side of my finger physically touching the frame inside the trigger guard. Not sure if thats gonna be a good suggestion with your glock 42, but for some damned reason it has helped me tighten groups alot with my little pocket pistol.