Sounds like you have it there as far as crimp adjustment. That's why I said it's really a taper/roll crimp hybrid. It's not like a full taper crimp as it does have some "roll' into the crimp groove but also actually squeezes, "tapers" some of the case mouth into the boolit. This can be overdone just like any crimp. That's usually where any galling condition occurs. I would say with this crimp die and a regular taper crimp die, looks are decieving somewhat as they hold better with an appearance that looks like not enough crimp sometimes. An excessive or light roll crimp is easier to spot in contrast to these crimps.
The Lee Collet Crimper is another ball game altogether as it uses the shellholder bearing on a sliding collet in the die itself which just pushes the last 1/16" or so of the case into the bullet with side pressure.
Alan you wildman, to be honest, I don't adjust the die that way. I usually go by the look of the crimp. You'll get a feel for it as you will see. Try a few crimps with it set too light and adjust from there.
Lastly, I myself, like to trim or make sure all case lengths are reasonably equal to one another. This will actually offer greater benefit in the long run as far as less crimp adjustment and more uniform crimps, negating especially, the dreaded "half-moon" look of a roll crimp on a case with an out of square mouth.
Have fun and don't get caught up to much in this crimp thingy.