I've always used carbide dies, and did not lube. Then I read advice that lube improves the process even with carbide dies. Now I always lube when resizing and expanding. I use Hornady One Shot case lube. I spray the cases, then load them in the case feeder on my progressive press. I get very smooth progress.
I clean the cases in the wet tumbler before I load them. I always start loading with clean, dry, sized and primed cases. I generally store most of my unloaded cases in this condition. The only thing that's varies is the priming.
My cases do not have lube on them when I charge with powder, seat the bullet and crimp.
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