My problem is that-at least on the Lee dies-I don't see any way(obvious or otherwise) to adjust the amount of case flare aside from adjusting the depth of the die in the press. The expander plug is held in place by powder-through attachment on top, which I have screwed in as tightly as it will go.
The instructions also make no mention of adjusting the amount of flare other than just adjusting the depth of the die.
Here's a diagram of the Lee dies-is there something I'm missing?
Hand Gun Dies - Lee Precision