Brass Shotshell Crimp - General Ammunition Discussion

What would be correct name & time frame for the type of crimp on this Winchester 10 ga brass shotshell?

Handloading .22 LR For Competition

FYI Some Cheditte 410 hulls have an issue with the flange

Interesting French metallic shotgun shell - General Ammunition Discussion - International Ammunition Association Web Forum

Brass Shotgun Shells

WRA Co No.12 Rival trench shotgun round - General Ammunition Discussion - International Ammunition Association Web Forum

Polishing rounds : r/reloading

Aguila Ammunition : Hecho en Mexico ~ Ammo Review & Range Test

357 MAX Shot Loads

Shotgun Shells - More Info to Share..

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Inconsistent crimp on factory 9mm : r/reloading

FC 45-70 Govt with a shotgun shell primer - General Ammunition Discussion - International Ammunition Association Web Forum