This video, "300 Blk Sizing Die Shootout - Part 3," focuses on modifying the expander ball within a Lee full-length resizing die for .300 Blackout ammunition. The creator previously identified that the standard Lee expander was too large, leading to insufficient neck tension on resized cases. The description mentions that all external links have been removed to comply with YouTube policies, with a Patreon link provided for support. The video is the third in a series addressing this specific reloading issue.
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