I use imperial wax on the outside of the case in the sizing die, but dip the neck in powdered graphite for the expansion step via mandrel. I don't bother cleaning it out after because I believe it prevents or at least reduces bullet weld. Graphite is already in the equation anyway as an anti-clumping agent on most powders.

Small container with steel shot and powdered graphite from Amazon. Cheap DIY and will last for years and years.


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I prefer peace. But if trouble must come, let it come in my time, so that my children may live in peace. ~~ Thomas Paine