Shot shell external corrosion - General Ammunition Discussion

What are these calcium looking buildups? I cleaned the one on the left. And it appears there is no cartridge wall breach (no hole). They are all live “REM-UMC No.12 Best” headstamped.

Ver·di·gris, really? - General Ammunition Discussion - International Ammunition Association Web Forum

Failure analysis of a rotary satellite kiln located in a cement production line - ScienceDirect

Gauges - Weld & Pitting - AUT Solutions Laser Based Corrosion Mapping - NDT Supply.com

Depleted uranium - Wikipedia

GUNS Magazine September 1956

Shot shell external corrosion - General Ammunition Discussion - International Ammunition Association Web Forum

Journal IA - International Ammunition Association

An all original , dated April 1888, Winchester model 1897 12gauge , as you all know this is the dreaded shotgun in battlefield 1. I have an original early serial number that

Shotshells 101 An Official Journal Of The NRA

Internal ballistic

Carcass, ammunition

Some interesting shotgun shells

Shotshells

Forensic 6-FORENSIC-BALLISTICS-BY-CLBN, PDF, Gun Barrel