I had to replace the expander plug in my powder-thru expander die for 9mm (I use the Lee Carbide 4-die set) because otherwise my brass swages my bullet down and causes barrel leading.
I'm about to start reloading for .380 ACP and am picking dies. The Lee 3-die set looks attractive (I don't really use the factory crimp die anyway, and if I need to remove belling down the road, I'll get a regular crimp die separately). I just want to know if, assuming my bullets are in the .359" or so range for diameter, I'll do okay with the stock expander plug that comes with this die set, or if I'll need to replace the plug with something that expands more/deeper.