Solving Issues with Brass Casings

Recently, while shooting a Norinco SKS, I experienced a failure to go into battery. Upon removing the cartridge, I found the round to be “shrouded” by another brass casing.

Brass Case Gage-CGB

Recycling Brass Shell Casings - Interco

Cases covered with soot - problem? Please advice!

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possible headspace issue?

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What's The Best Way To Clean Brass?

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Solved] The cartridge casings below were collected from a wall

Should I sell or keep the brass from my bullet casings? - Quora

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A New Method of DNA Testing Could Solve More Shootings

What's The Best Way To Clean Brass?