Name: How do Bullets work?
Uploaded: 2025-11-10T21:01:10.000Z
Duration: 2 min 41 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

This tiny object holds enough power to punch through steel.

A little metal capsule that turns chemistry into raw speed.

And inside, a design so clever, it changed weapons forever.

At the front, we have the bullet itself, also known as the projectile.

It's typically a dense lead core, often wrapped in a copper jacket, shaped for one purpose and one purpose only.

The entire assembly is held together by the casing.

Made of brass or steel, this is the engine block.

It holds everything together and expands when fired to seal the chamber, trapping the pressure inside.

Not black powder like in old movies, but modern smokeless powder.

Tiny grains that burn in microseconds, generating immense gas pressure.

One strike and the whole chain reaction begins.

The firing pin slams into the primer. Bang.

In microseconds, pressure skyrockets to thousands of PSI.

With nowhere else to go, that force hammers the bullet forward.

It races down the barrel and out at speeds of hundreds, sometimes over a thousand meters per second.

And it all happens in just a couple of milliseconds.