Here's a hint that can save a few $$. If you are considering special expander plugs and dies, check the die bodies you have on hand. Some dies are inside threaded in such a way that standard expander plugs can be used, so that you don't need to buy a separate body for your expanders.
Without checking the details, I believe there are two different inside diameters in standard dies. For example, I use a spare body from an RCBS seater for my .40 expander. In addition to Lyman M die bodies, other Lyman bodies can accept an expander plug. Reddings have a different diameter.
Paul
