LESSON 5

Question 1

Define cartridge case.

Answer 1

It is a tubular metallic or non-metallic container, which holds together the bullet, gun powder and primer. Another term of a cartridge case is “shell or “casing”.

Question 2

Explain the functions of a cartridge case.

Answer 2

1. It holds the bullet
2. It serves as waterproof container for the gunpowder.
3. It prevents the escape of the gases to the rear as the sidewalls of the cartridge case are forced against the walls of the chamber by the pressure.

Question 3

ENUMERATE THE DIFFERENT PARTS OF THE CARTRIDGE CASE

Answer 3

1. Rim
2. Primer pocket
3. Vents or Flash hole
4. The head and Body
5. Neck
6. Cannelures
7. Crimp
8. Base
9. Shoulder
10. Extract groove

Question 4

is that part of of the cartridge case designed to limit the forward movement of the cartridge to the chamber.

Answer 4

Rim

Question 5

part of the cartridge case which provides the means for the primer to be put in the central position

Answer 5

Primer pocket

Question 6

Functions of Primer Pocket

Answer 6

a. hold the primer in place

b. to provide means to prevent the escape of gas

c. to provide solid support for primer anvil

Question 7

is the hole at the bottom of the primer pocket that serves as the passage way for the priming mixture to impart an ignition to the propellant charge.

Answer 7

Vents or Flash hole

Question 8

Part of the cartridge case that constitute the cork that plugs the breech of the barrel against the escape of the gas.

Answer 8

The head and body

Question 9

Part of the cartridge case which is actually occupied by the bullet

Answer 9

Neck

Question 10

It is the cylindrical groove in the outer surface of the cartridge case designed to secure the shell to the chamber as well as to prevent the bullet from being pushed down to the powder charge.

Answer 10

Cannelure

Question 11

It is the cylindrical groove on the mouth of the shell

Answer 11

Crimp

Question 12

Two (2) purposes of the Crimp:

Answer 12

1. To hold the bullet and prevent it from being pulled out from the shell and
2. Offer resistance to the bullet out of the neck to ensure the burning of the gun powder

Question 13

Is the bottom portion of the cartridge case which contains the head stamp marking on the base of the shell containing the caliber, manufacturer, and in some cases including the date, trade name, and batch number.

Answer 13

Base

Question 14

Part of the cartridge case which supports the neck of the cartridge which is evident in a bottleneck type

Answer 14

Shoulder

Question 15

Is the circular groove near the rim of the shell designed for automatic withdrawal of the case from the chamber.

Answer 15

Extractor groove

Question 16

CLASSIFICATION OF CARTRIDGE ACCORDING TO SHAPE:

Answer 16

1. STRAIGHT CASE- REVOLVER (shotshell)
2. TAPERED CASE- MAGNUM JET CAL.22
3. BOTTLE NECK CASES- RIFLES (longer (length) than straight case)

Question 17

CLASSIFY CARTRIDGE ACCORDING TO HEAD FORM:

Answer 17

1. RIMMED TYPE- for revolvers; the rim of the cartridge is longer than the body
2. SEMI-RIMMED- presence of Estracting Groove. Slightly shorter compared to rimmed type
3. RIMLESS- common on pistols; head is proportional to the body of the cartridge