I have been using dry graphite lube for years now. The type marketed for door locks. It comes in black power form. I used an old plastic bullet box and filled it with #7.5 lead shot taken from some 12g shells. Pour the powder in and shake it vigorously. Then just dip the case mouth in and give it a twist. It does deposit some on the outside of the case neck but after sizing just a quick wipe with a rag and its done. No need to clean inside the neck. No spray, no mess, and a tube of graphite has lasted 8 years now.
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