It's the powder check die saying not enough or too much powder. I'm about to take it off, it's not very accurate. It'll go off and show too much or too little but it weighs out at 6 grains every time, which is what I've got it set at.
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I called Dillon at 11:15 our time, 9:15am local to them. Fifteen minutes after they opened.
I was caller 14. I ended up emailing them.