As long as there's nothing bad wrong with your brass, your two die set, and the neck portion of the FL die isn't a lot tighter than it needs to be for the batch of brass involved you can do some pretty fine work with basic equipment.
The italicized part is pretty important. It's what gives expander balls a bad reputation. It would be quite easy for me to demonstrate this to a student at my loading bench. I have at least six FL dies for 308 Winchester and a wide variety of brass of differing thickness.
