Honest question, just what does it matter whether or not the primer pocket is clean with salt bath?
+1
Inquiring minds want to know.
It doesn't. Maybe he thought the fouling in the case mouth was the problem? It doesn't cause any problems for me in salt bath annealing though. Cases do have to be completely dry though; if they are damp inside, THAT is a disaster.
(900° liquid + submerged moisture = steam explosion)
