So I have an Accu Shadow and a G17, I use my CZ for competitionn and I kept my G17 as one of my HD gun. Both guns are just as reliable for me. I definitely would trust my CZ as HD gun when situation presents itself. I think the most important factor for me is to know them and to train with them regularly, for that matter, any gun you train with can be used as HD gun. One thing that I also keep next to my nightstand HD gun is a good handheld flashlight (200+ lumen)