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Old 02-02-2023, 3:31 AM
pacrat pacrat is offline
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Quote:
Originally Posted by Zamble View Post
It’s actually an old issue. I bought my Super 1050 and equipment new from Dillon somewhere around 2014. The issue has happened since then. Not in overwhelming numbers, just enough to be unpredictable and annoying.
I only have this issue with the .223. I also load .380, 9, 38/.357, .40, .45 and .308. And have not had any issues with any of my other caliber reloads.
I have not marked the offending brass, but in the ones it occurs with, the bcg is almost completely forward. I can barely see a gap from it not closing all of the way. I have “experimented”, though. When a round has this issue, I have troubles extracting the round. I have fed it a time our two more and it will seat and eject normally.
Are the offending cases Mil-Surp? If so you likely just need a separate "Small Base Sizing Die". For a one time use, on a single stage press, for MilSurp cases due to the heads being swelled from Full Auto firing in guns with generous MilSpec chambers.

To diagnose issue. Use a black Marker Pen to ink the neck-shoulder, and head area of a few offending cases up about 3/4 " from base. And cycle them. After ejection, or driving out with cleaning rod. Inspect for shiny swipes where the ink was wiped off. Odds are if MilSurp cases. The case heads will be swollen. And a standard sizer won't reach down far enough to deal with it.
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