Case head separation or sizing die marks?
case head seperation? Long Range Hunting Forum
Case Head separation false alarm? TRG42- 338 LM
Mark on Maintenance – P-51 Header Tanks
Case Gauge « Daily Bulletin
Case head separation and what it looks like before it happens
Avoiding case head separation by measurement
Vintage Brass Squeegee 11.5 Ettore Steccone Products Master
Case Head Separation
Firearms Examiner Training, Glossary