SOLVED! 44 Mag Overpressure Mystery

Microscope used in this story: https://ebay.to/2BJfeTX
Full story: https://bit.ly/2MZDdWG

Thanks everyone for your help solving this mystery! What was the issue causing dangerous looking pressure signs in my 44 magnum ammo? Watch the video to find out!

See also: Part 1, the Mystery:    • Unsolved: 44 Magnum Over-Pressure Mystery  

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