On his Riflemans' Journal blog, German Salazar wrote an excellent article about cartridge Case-Head Separation. We strongly recommend that you read this article.
Case Head Separation and Why it Happens
Reloading Essentials: How to spot a potential case head separation
:max_bytes(150000):strip_icc()/the-digital-divide-5116352-V1-fa4c42a027aa43bda4da16e973097b06.png)
The Digital Divide: What It Is, and What's Being Done to Close It
Case Separation « Daily Bulletin
Separation anxiety in adults: Symptoms, treatment, and management
Case Failure « Daily Bulletin
Case head separation and what it looks like before it happens
Estimating waves via measured ship responses
Case head separation causes, identification and prevention when reloading
Case head separation causes, identification and prevention when reloading