Why doesn't the shell casing of a bullet expand when the bullet is

Why doesn't the shell casing of a bullet expand when the bullet is

Ammo 101: The 4 Parts Of A Cartridge - Pew Pew Tactical

Why do bullets needs to have shells/casings? - Quora

Would a molten plastic filling of the cavity on a hollow point bullet make it expand more reliably, since it doesn't rely on impacting against fluid to do so? - Quora

Ammo casings are a source of much debate and confusion.

Soft Point Bullets - What Are They & Why Use Them?

How can a prop gun used on movie set be deadly?

What does an unspent bullet round mean? - Quora

Given the length of protuberance from the case, why doesn't the 6.5x52mm Carcano bullet start tumbling at some point immediately after the round exits the rifle barrel? - Quora

Best Ammo for 1911 45 ACP Chosen by Experts at

Ammo 101, Tactical Experts

When was the first bullet gun made? - Quora

Bullet Casing Crafting Beads - Real Fired Casings, shooting, Guns, Jewelry

50 Caliber Bullet Casing Shot Glasses

Thought this was a bullet casing, but there's a C there instead of a primer. Found on the floor at a mall. : r/whatisthisthing

6.02 Firearm Evidence

A fired bullet and cartridge case