it's unlike almost anything else in the hobby, just because there are so many inter-depdent parameters...
for example:
If you increase the range enough you'll start getting splotchy results because the droplets collide in air and form bigger blobs. You'll also hit a much wider area of the mini because you're firing in a cone.
but if you increase pressure the cone will be more stable as the droplets are flying at a higher velocity so you can effectively spray at greater range. However, if you increase pressure you'll pull more paint out of the airbrush meaning more paint will hit the model in shorter time. If enough paint hits the model in short enough time paint won't dry in time and you'll start getting flooding.
What also can happen with high PSI is that if you haven't thinned the paint enough the higher friction from the air will dry the paint while in the air causing it to start dusting and spider webbing instead....
Like every lever you pull affects 3+ things so it's so hard to at random figure out what is the right combination of levers.