Describe a Primer
It is a small metal cup containing an explosive compound. It is heat and pressure sensitive. When it is struck and explosion occurs.
Describe the Powder
The powder burns creating a expansion gasses, which creates a pressure build-up - which will push the bullet down the barrel.
Describe the case.
A brass, steel or copper cylinder closed at one end l. Its function is to hold all the other components together.
Bullet
Usually made of lead covered with a copper jacket. It leaves the barrel and strikes the target.
Explain the cartridge firing sequence.
- Squeezing the trigger on the firearm will cause the firing pin to strike the primer.
- The primer explodes sending a flash to the case.
- The flame ignites the powder.
- The powder burns creating a pressure build- up behind the bullet.
- The pressure build-up will push the bullet down the barrel and toward the target.
Explain how to identify the calibre of a cartridge.
At the bottom of a cartridge, you will see a headstand. On it you will see the calibre printed for the cartridge.
Which is the only component of the cartridge that strikes the target?
The bullet
How many lead pellets will you find in a SSG shortgun cartridge?
5
What is a hollow point bullet designed to do on impact?
Hollow point or dum dums, are designed to expand on impact causing a large surface wound but less likely to over-penetrate.
