Mark, appreciate that you tracked this down. I had a load that shot really well and should have been ok but was showing light ejector marks. I too am using Imperial and was simply wiping the cases down with rag after sizing. I'm going to load 5 more of that load and make sure they're squeaky clean just to see if I get the same results.
Understand you're using lacquer thinner to wipe down. If you hadn't had that already and had to go buy something what do you think the best cleaner to use would be?
Understand you're using lacquer thinner to wipe down. If you hadn't had that already and had to go buy something what do you think the best cleaner to use would be?