lesson VI

Question 1

This refers to a complete assembly of priming composition, paper disk, anvil and the vent. It is also a portion of the cartridge case which consists of brass or gilding metal cup. The primer cup inside the cartridge case contains a highly sensitive mixture of chemical compound that is when struck by the firing pin would detonate or ignite. This reaction is called percussion.

Answer 1

Primer

Question 2

This refers to European type of primer.

Answer 2

Berdan primer

Question 3

This refers to American type of primer which has a single vent.

Answer 3

Boxer primer

Question 4

This refers to a container of the priming mixture. It is composed of brass and copper or any other gilding metal.

Answer 4

Primer cup

Question 5

This refers to a thin but rigid metal strip where the priming mixture is crushed once the firing pin strikes the primer cup.

Answer 5

Anvil

Question 6

This refers to the space at the center bottom of the shell where the primer cup, priming mixture and anvil occupy.

Answer 6

Primer pocket

Question 7

This refers to a small piece of paper or disc of tin foil which is pressed over the priming mixture. Its dual purpose is to;

Answer 7

Disc

Question 8

This refers to the chemical component of the primer. The primer is a volatile (highly sensitive) chemical in powdered form contained in the primer cup. Once its volume is compressed, it automatically undergoes rapid combustion. The priming mixture is usually made of lead styphnate, barium nitrate, and antimony sulfide. Lead, barium and antimony elements are typical in primers of center - fire cartridges.

Answer 8

Priming mixture

Question 9

two (2) classes of modern priming mixture:

Answer 9

Corrosive primer
Non-corrosive primer