Ballistics Flashcards Preview

jeremy harmon > Ballistics > Flashcards

Flashcards in Ballistics Deck (44):
1

Barrel

The long metal tube that guides a projectile out of a firearm

2

Breech or (Breechface)

The end of the barrel attached to the firing mechanism of a firearm where the cartridge is loaded or unloaded

3

Bullet

The projectile that is released when a firearm is discharged

4

Caliber

A measure of the inside diameter of a firearm barrel

5

Cartridge

A case that holds a bullet, primer powder and gun powder

6

Firearm

A weapon capable of firing a projectile using a confined explosive as a propellant

7

Ballistics

The study of projectiles and firearms

8

Grooves

DEPRESSIONS found on the inside of a firearms barrel that are created when firearm is manufactured

9

Gunshot Residue (GSR)

The tiny particles expelled from a firearm when fired

10

Lands

RIDGES found on the inside of a firearms barrel that are created when firearm is manufactured

11

Muzzle

The end of the barrel from which the projectile exits a firearm

12

Rifling

The spiral pattern of lands and grooves in the barrel of a firearm

13

Shell casing

The metal housing for the gun powder of a firearm

14

Trajectory

The path of flight of a projectile

15

True or false (correct if false):The lands and grooves of a barrels rifling improve the accuracy of a bullet

True

16

True or false (correct if false) : The caliber of a cartridge is always measured in mm.

False
Usually measured in inches

17

True or false (correct if false): Firing Pin marks are found on the back of a bullet.

False. Cartridge cases

18

True or false (correct if false): Lands and grooves help match a crime scene bullet with its shell casing

False. Gun

19

True or false (correct if false): The caliber of a bullet is related to its width

True

20

True or false (correct if false): Semiautomatic pistols store cartridges in a cylinder.

False! magazine

21

True or false (correct if false): The equation for determining the height from which a shot was fired is B= Ax sin(O)

False! B= atan(O)

22

True or false (correct if false): The grooves on a bullet are made by the lands on the barrel and thus correspond in width.

True

23

True or false (correct if false): The head stamp always lists the caliber of the cartridge.

False! Usually

24

True or false (correct if false): Handguns are more accurate and shoot to longer distances than rifles.

False
Rifles
Handguns

25

True or false (correct if false): Lands and grooves help match a crime scene bullet with its shell casing

False. Gun

26

True or false (correct if false): The caliber of a bullet is related to its width

True

27

True or false (correct if false): Semiautomatic pistols store cartridges in a cylinder.

False! magazine

28

True or false (correct if false): The equation for determining the height from which a shot was fired is B= Ax sin(O)

False! B= atan(O)

29

True or false (correct if false): The grooves on a bullet are made by the lands on the barrel and thus correspond in width.

True

30

What 4 things does a cartridge contain?

Bullet, case, gunpowder, primer

31

What are the 7 steps that are taken when firing a gun? Start with pulling trigger and end with bullet hitting the target

1. pull trigger
2. Hammer hits firing pin
3. Firing pin hits primer
4. Primer ignites gunpowder
5. Pressure shoots out bullet
6. Bullet travels along trajectory
7. Bullet hits target

32

What is the purpose of the extractor?

To remove the spent casing

33

What are the two different types of handguns?

Pistol and revolver

34

What are two similarities of a revolver and pistol?

Close range and both handguns

35

What are two differences of a pistol and revolver?

Pistol: magazine/ safety
Revolver: cylinder/ no safety

36

What are the three types of rifles?

Bolt action, lever action, and automatic

37

What is one difference between bolt action, lever action and automatic rifles ?

Bolt: longer distance
Lever action: less powerful
Automatic rifles: military

38

What are three similarities between the bolt action, lever action and automatics?

Long guns, larger rounds, and greater distances

39

What are the three different types of shotgun ammunitions?

Bird shot, buck shot, and slug

40

What is one difference between the three shotgun ammunitions: bird, Buck and slug?

Bird shot: small pellets Buck: larger pellets
Slug: single bullet

41

What is one similarity about the three shotgun ammunitions: bird, Buck and slug?

All are used for hunting birds or small animals that move quickly

42

What are the three types of ballistics?

Internal, external and terminal

43

What is one difference between the three types of ballistics: internal, external and terminal?

Internal: inside the firearm
External: flight of bullet
Terminal: the target

44

What is one similarity between the three types of ballistics: internal, external and terminal?

All scientific analysis of all ballistics evidence is to determine what actually happened.

Decks in jeremy harmon Class (107):