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Forensic Ballistics > Forensic Ballistics > Flashcards

Forensic Ballistics Flashcards

1
Q

is a loaded shell for any firearm such as revolver, pistol and rifles.

A

ammunition

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2
Q

a complete unfired ammo consisting of bullet, shell, gunpowder and primer. Ammunition and cartridge can be used interchangeably.

A

cartridge

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3
Q

He invented the 1st cartridge in 1635.

A

king gustavus adolphus

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4
Q

He invented another cartridge in 1846.

A

benjamin hollier

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5
Q

A French gunsmith. He invented the 1st pin fire cartridge and 1st pin fire gun.
- He was born in Bonnétable and died in Paris.

A

cassimir lefaucheux

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6
Q

developed one of the earliest cartridges known as Flobert Cartridges, this became the forerunner of American Rim Fire Ammo.

A

Louis Nicolas A. Flobert

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7
Q

external pin is used near the head of the cartridge.

A

pin-fire cartridge

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8
Q

priming mixture is place around the rim.

A

rim-fire cartridge

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9
Q

priming mixture is placed in the center of the head of cartridge.

A

center-fire cartridge

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10
Q

needs mechanical blow against the percussion cap.

A

percussion

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11
Q

cartridge is giving a muzzle velocity of less than 1850 ft/sec

A

low powder

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12
Q

1925 to 2500 ft/sec

A

high powder

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13
Q

Over 2500 ft/sec

A

high intensity

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14
Q

Shotgun cartridge contains multiple rounded projectiles called

A

pellets/shots/balls

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15
Q

A shotgun cartridge containing a single projectile of a shotgun ammo is called

A

sabot slug

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16
Q

Needle-like projectiles inside a shotgun cartridge are called

A

flechette

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17
Q

a plastic cap that holds the shots.

A

shot cup

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18
Q

being bent inward to hold the shot in place

A

crimp

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18
Q

comparable to shell/casing of ammunition of long/short arms. Prior to 1960, paper is used as casing for shotgun ammo

A

tube

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19
Q

the thing that is being ignited that causes the tremendous pushing of bullet

A

gunpowder

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20
Q

collective term for chemical priming compound, primer cup, anvil, and battery cup that is being struck to ignite the powder

A

primer

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21
Q

a disk made of paper, used to hold the powder or shot

A

wad

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22
Q

pure lead

A

drop/soft shot

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23
Q

hardened by antimony

A

chilled/ hard shot

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24
Q

coated with cupronickel or 70% copper and 30% nickel or steel shot

A

plated shot

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25
Q

consists of lead balls

A

buckshot

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26
Q

single slug with angled grooves cut into its side to spin it. This refers to Sabot slug

A

slug

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27
Q

a cluster of sturdy steel needles with tiny fins at their base to stabilize them in flight

A

flechette

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28
Q

formed from powdered tungsten and iron, blended together and pressed into a pellet

A

tungsten-iron shot

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29
Q

This is the shelf life of a new cartridge. If components or parts used are commercially virgins. The life of an ammunition depends on the manner of storage.

A

20-40 years

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30
Q

the process of military storage of ammunition or arms. Done by making a concrete bunker with walls about a foot thick and then covered. Ammo may reach 40 years with no degradation

A

igloo

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31
Q

refers to the tubular casing or shell of an ammunition that holds the bullet and contains the gunpowder

A

cartridge case

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32
Q

the edge of shell’s opening

A

mouth

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32
Q

part of mouth that is turned in upon the bullet

A

crimp

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33
Q

are the serrated groves around the neck

A

shell cannelures

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34
Q

occupied by the bullet

A

neck

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35
Q

supports the neck

A

shoulder

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36
Q

contains gunpowder

A

body

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36
Q

the circular groove near the base of the shell designed for the automatic withdrawal of the case after firing

A

extracting groove

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37
Q

limits the forward travel of cartridges into the chamber

A

rim

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38
Q

located at central base that contains the priming mixture

A

primer

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39
Q

the base portion that contains the head stamp

A

shell head

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40
Q

is used secure the bullet in the shell to avoid being moved or loosened from its gripped

A

crimp

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41
Q

used in the cartridge with headspace on the cartridge case mouth with lead bullets.

A

taper crimp

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41
Q

used only on jacketed ammo that consists of dimples or grooves pressed into the mouth.

A

stab/ ring crimp

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41
Q

located at the neck that is rolled into the groove of the bullet

A

roll crimp

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42
Q

rim diameter is greater than the body (Cal .38 and Cal .22)

A

rimmed

42
Q

rim diameter is SLIGHTLY greater than the body (Cal .25, Cal .32 auto, Cal .38 Super)

A

semi-rimmed

43
Q

rim is equal with the body (Cal 5.56mm, Cal .30, 9mm, Cal .45)

A

rimless

44
Q

rim is smaller than the body (Cal 8mm x 59)

A

rebated

44
Q

a protruding metal is belted around the shell (Cal .338 magnum, 13.9 x 99

A

belted

45
Q

found on the primer (particularly on the primer cup). Note: Glock Pistols have rectangular firing pin marks.

A

firing pin marks

46
Q

found on the base of shell. Caused by the breech face.

A

breech face mark

46
Q

found on the extracting groove

A

extractor marks

46
Q

found on the body of shell. Caused by the magazine lips during loading

A

magazine marks

47
Q

located at the rim at the base of shell fired from automatic FAs

A

ejector marks

47
Q

found on the body of the shell. Caused by the irregularities inside the chamber

A

chamber marks

48
Q

found on the side of the rim. Caused by the contact between the shell and ejection port of the FA (Pistol).

A

ejector port marks

48
Q

found on the primer near the firing pin mark. It is just a rebound or duplication of firing pin mark

A

shearing marks

48
Q

found on the base of rimmed type shell. Caused by Break Type Revolver during loading.

A

pivotal marks

49
Q

study of the motion of the projectiles

A

ballistics

50
Q

means “to throw

A

ballien/ballo

51
Q

refers to the bullet/slug/ball/pellet/flechette that passes through the barrel of FA

A

projectile

52
Q

is the science of firearms identification by means of the ammunition fired through them

A

forensic ballistics

53
Q

as applied to ballistics or to any other subjects suggests a relationship to a court of justice and legal proceedings. Derived from the Latin word Forensis which means “Forum,” that means “a public/market place, wherein people gathered for discussion of a subject in issue

A

forensic

54
Q

movement of projectile inside and outside barrel.

A

motion

55
Q

– the forward movement of projectile with the action of expansive force of gases.

A

direct motion

56
Q

the turning of bullet inside and outside barrel with the action of the rifling

A

rotary motion

57
Q

the movement of projectile after hitting the target

A

translational

58
Q

failure of cartridge to explode

A

misfire

59
Q
  • From Breech to the Muzzle of barrel
A

interior ballistics

60
Q

is the delay of explosion

A

hangfire

61
Q

created during manufacture such as spiral cutting of the grooves

A

irregularities

62
Q

– not polished well

A

roughness

62
Q

caused by tools used in the manufacture of the chamber

A

scratches

63
Q

caused by the drill blade and is beyond the control of a man

A

imperfection

63
Q

occurs when shell is separated from the bullet, the shell will be push back to the breech face leaving such marks

A

breech face marks

64
Q
  • that cause the target person to be thrown on the ground or falls down
A

knocking effect

64
Q

refers to the fatal equivalent of a bullet

A

energy

65
Q

is the rearward movement of the gun caused by equal and opposite reaction of the gun against the forward movement of the bullet after the explosion

A

recoil

66
Q

in every action, there is corresponding opposite reaction

A

kinetic energy principle

66
Q

gadget that is attached to the muzzle of the gun to reduce recoil

A

compensator/muzzle brake

67
Q

is used to load the proper amount of gunpowder in every ammunition

A

ballistics data

68
Q

the stability of the bullet within the effective range due to the twist of the rifling

A

gyroscopic stability

69
Q

a lubricant substance used to prevent the adherence of Metal fowl

A

graphite

70
Q

refers to the metal strips left by bullet inside. These could be removed with the use of steel brush

A

metal fowl

71
Q

the energy generated at the muzzle

A

muzzle energy

72
Q

from after leaving the muzzle to before immediately hitting the target

A

exterior ballistics

73
Q

noise or sound created at the muzzle

A

muzzle blast

74
Q

the actual curve path of the bullet

A

trajectory

74
Q

distance at which the bullet is expected to be lethal

A

effective/ accurate range

75
Q

between muzzle and target

A

range

76
Q

maximum distance a projectile can reach

A

maximum range

77
Q

rate of the speed of the bullet (feet per second)

A

velocity

77
Q

the capacity of the bullet to resist air during its flight from the muzzle of the gun

A

air resistance

78
Q

the dragging of the bullet downward due to air resistance

A

aerodynamic drag

79
Q

the deceleration of bullet on flight due to gravityballistics

A

ballistic pendulum

80
Q

allows a body at rest to remain at rest or body in motion to remain in motion

A

inertia

81
Q

caused by yawing of bullet resulting to hitting of target sideways resulting to oval-like entry of bullet

A

keyhole shot

81
Q

the unstable movement of bullet on flight such as wobbling (Tail wag) or tumbling of bullet before hitting target

A

yawing

82
Q

the downward movement of the bullet after reaching its maximum range

A

pull of gravity

83
Q

– the entry of the bullet in the target

A

penetration

84
Q

the bouncing of a projectile after hitting a surface

A

ricochet

85
Q

the study of effects/impact of projectile to the target

A

terminal ballistics

85
Q

size of the bullet grouping on the target

A

terminal accuracy

85
Q

energy of the projectile upon striking the target.

A

terminal energy

86
Q

depth of the bullet penetration on the target

A

terminal penetration

87
Q

speed of the bullet inside the target.

A

terminal velocity

87
Q

science of FA identification by means of the ammunition fired through them

A

forensic ballistics

87
Q

the presentation of the “Ballistics Report” on firearms, bullet, shells and allied exhibits in court

A

legal proceedings

88
Q

discharge single but usually multiple shots/pellets in single fire

A

shotgun

88
Q

focused with the study of shots/pellets from smoothbore firearms like shotguns and muskets

A

shot ballistics

89
Q

appears with smudges of gunpowder with cherry-red discoloration

A

muzzle imprint

89
Q

is another smoothbore firearm that discharges single ball in one firing

A

musket

90
Q

can be found at a distance of 5-8 yards

A

shot wads

90
Q

with the use of shotgun appear externally with a circular defect approximating the bore of the weapon used

A

contact wounds

91
Q

the actual curve path of the bullet

A

trajectory

Forensic Ballistics (4 decks)

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