00:28Transcription by CastingWords
00:30This tiny object holds enough power to punch through steel.
00:33And no, it's not called a bullet.
00:36It's a cartridge, a little metal capsule that turns chemistry into raw speed.
00:41And inside, a design so clever it changed weapons forever.
00:48Let's crack it open.
00:51At the front, we have the bullet itself, also known as the projectile.
00:56The only part that leaves the gun.
01:00It's typically a dense lead core, often wrapped in a copper jacket.
01:05Shaped for one purpose and one purpose only.
01:08To fly fast and hit hard.
01:11The entire assembly is held together by the casing.
01:16Made of brass or steel, this is the engine block.
01:20It holds everything together and expands when fired to seal the chamber, trapping the pressure inside.
01:28Next is the propellant.
01:31Not black powder like in old movies, but modern smokeless powder.
01:35Tiny grains that burn in microseconds, generating immense gas pressure.
01:43And finally, the primer at the base.
01:47A tiny, shock-sensitive explosive.
01:51One strike and the whole chain reaction begins.
01:56Here's the sequence.
01:58The firing pin slams into the primer.
02:00Bang.
02:01A spark ignites the propellant.
02:05In microseconds, pressure skyrockets to thousands of psi.
02:09With nowhere else to go, that force hammers the bullet forward.
02:14It races down the barrel and out.
02:16At speeds of hundreds, sometimes over a thousand meters per second.
02:21That's faster than sound.
02:23And it all happens in just a couple of milliseconds.
02:27One tiny spark, one controlled burn, one supersonic shot, all in less time than a blink.
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