What do these markings tell me about this shell casing? I know

Are once fired empty brass casings safe for jewelry, decor or

Shotgun Shells Explained - NSSF Let's Go Shooting

Artillery shell cases, fuzes, primers and tubes. – Stephen Taylor, WW2 Relic Hunter

Forensic firearm examination - Wikipedia

Memorabilia - 30mm Shell Casing, c. 1946

military - Can anyone tell me anything about the markings on these

18-lbr. Shellcase Markings request - Arms and other weapons - The

What do these markings tell me about this shell casing? I know it's a 25 Pounder from 1942, but that's about it. : r/Militariacollecting

Cartridge case terminology and identification – Stephen Taylor

30mm Aden Practice Round Shell Casing – Tales from the Supply Depot

How do people identify guns with bullet casings and shot wounds

Bullet Sizes vs. Bullet Caliber, How Do They Name These Things?

Need help identifying this 3 shell, please (Added information on

Trying to identify shell case markings - General Ammunition

Cartridge case terminology and identification – Stephen Taylor