This video details a comprehensive shootout of 300 Blackout sizing dies, focusing on brass forming and neck tension. The instructor analyzes various brass headstamps, comparing the performance of Lee, Forster, and RCBS dies. Key findings include identifying problematic brass (PPU, Wolf) due to neck thickness and demonstrating methods to measure and improve neck tension, such as modifying expander balls and adjusting headspace. The analysis emphasizes the critical role of proper sizing for reliable chambering and preventing bullet setback.
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