I have come to a reckoning when it comes to dry practice. I now dry practice a very certain way and I teach my students to practice this way. I've found it helpful and my students have found it helpful.
All trainers have opinions and if you don't agree with mine, I'm quite fine with that. I'm not the best shooter in the world, but I'm not bad. I'm also pretty good at helping others to become better shooters. If you require either GM ranking or 100 confirmed kills as credentials before you listen to what I have to say, then move along because I possess neither.
If you are staging the trigger during dry practice, you're screwing yourself. An exaggeratedly slow trigger press almost never increases your chance of getting a hit. In fact, what it does is significantly contributes to the anticipation that leads to jerking the trigger. You all know what that looks like; for right-handed shooters it tends to manifest itself as hits low left. You are better off pressing the trigger straight through decisively, regardless of trigger characteristics. This short-circuits mental agony which helps mitigate jerking the trigger due to anticipation.
If you aren't achieving a full firing grip during dry practice, you're screwing yourself. You know the gun isn't going to recoil, so you hold the gun like a dead fish. However, your hands interact with each other and with the gun differently when your full firing grip is achieved. It's tempting to shortcut your support hand grip during dry practice because with striker-fired guns you continuously remove it to reset the trigger via the slide. Don't do it. Pivot those knuckles like a hinge and drive the base of the palm of your support hand into the grip to provide tight, full 360 degree coverage.
If you persist in using "just the tip" of your trigger finger because you were trained that way, you're screwing yourself. If you're reading this you've likely taken formal training and you've likely been told to use just the tip of your finger on the trigger. I'm telling you to use how much ever finger you need to minimize movement of the gun. This requires experimentation. You may only need just the tip of your finger. You may need to jam your whole finger in up to the second knuckle. You need to figure it out, and now is the time. You'll know when it's right, because the sights won't move.
If you are worried about trying to simulate "catching the link" during dry practice, you're screwing yourself. BANG-CLICK is something I wish I could purge instantly from my students, but instead I need to rely upon 3,000 to 5,000 repetitions. Such is life. If you've been trained to "catch the link" (press the trigger, hold it to the rear, gun cycles, sights back on target, let the trigger out to reset point, press the trigger again) you've been taught a technique that isn't particularly helpful. You're far better off simply relaxing your trigger finger during the recoil of the gun and being ready to fire that next shot when the sights fall back down on target. So with all that said, quit trying to simulate catching the link during dry practice. It's not doing anything useful.
If you think lots of live fire means you can skip dry practice, you're screwing yourself. Dry practice allows you to look at things differently than live fire. If you have a mentality that you "shoot all the time" therefore you don't need to dry practice, you're depriving yourself of a very simple and effective methodology for improvement. Don't view dry practice as something to do only when you can't get to the range.
Obviously the focus of the above is narrowed down to practicing the perfect trigger press with a normal two handed grip. SHO and WHO practice has some additional nuance. Ultimately, the goal of dry practice should be to develop a perfect trigger press and to work on techniques which don't require live rounds to go down range. Focusing on developing the perfect trigger press requires you to move the trigger to the rear while keeping three axis stability of the boreline. Through combination of strong support hand grip, an understanding of the subtle interaction of support hand and master grip, trigger finger positioning in relation to the trigger face, and authoritative but controlled trigger movement, you will be able to achieve the goal of pressing the trigger without having your sights appreciably move.
If you hate this post and think I should die, I'm fine with that. I would suggest giving what I said a try first, though. Anyway, you didn't have to pay me for these big secrets, so what do you have to lose?