 You will press it quickly, trying to get the timing right for when the sights swing past the bullseye. By jerking the trigger, which is what you're really doing, you're going to yank the gun off. You may not even notice that you're doing it. In fact, you probably won't. The recoil will cover that up. But your shot will be off, most likely low and left if you're right-handed. But if you just keep increasing pressure and don't worry about where the sights are, because that will take care of itself.