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Flashcards in Gunshots Deck (28)
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1
Q

What do smooth bore weapons fire?

A

Multiple pellets e.g. shotgun

2
Q

What kind of weapojn is a handgun?

A

Rifled

3
Q

Give examples of interior ballistics?

A
  1. Rifling karks on bullet: class characteristics for make/model, individual for unique to gun
  2. Cartridge case
  3. Primer cap/firing pin
  4. Fingerprints
4
Q

What makes up primer in small arms?

A

Lead. barium and antimony

5
Q

What types of primer are there?

A

Centre fire and rim fgire

6
Q

What makes up propellant

A

Smokeless poweder:: nitrocellulose plus/mins nitroglycerine

7
Q

When are lead bullets used?

A

In revolvers and 22 rimfire cartridgres

8
Q

What kind of lead bullets are available?

A

Round nose#Wadcutter and hollow point

9
Q

What are jacketed bullets used in?

A

Autoloading pistols and HV rifles

10
Q

What kind of types of jacketed bullets exist?

A

Full metal jacket (HV military rifle)
Partial metal jacket (hunting and autoload pistol)
Semi-jacketed hollow soft point (hunting)
Silvertip (al)

11
Q

What kind of wound do bullets cause?

A

Direct laceration

12
Q

Explain temporary cavity?

A

lasts 800 m/s
Wide zone of haemorrhage around permanent cavity
Dense inelastic organ (liver) may rupture

13
Q

With a pistol: how far out does the flame go?

A

3 inches

14
Q

With a pistol: how far out does the smoke go?

A

6 inches

15
Q

With a pistol: how far out does the tattooing go?

A

18 inches

16
Q

When bullet enters and exits what is hole size like?

A

Small on entry, big on exit

17
Q

What size are temporary cavities?

A

30-40 times that of bullet, tremendous pressure and lasts milliseconds

18
Q

What causes tattooing?

A

Propellant

19
Q

At contact range, what is seared into margins?

A

Soot and propellant

20
Q

Between contact and intermediate range what occurs?

A

No tattooing, soot and propellant seared into margins and peripheral ring of soot staining (soot reaches 20-30cm and can be wiped off)1

21
Q

Whast is intermediate range?

A

Few cm to 1m (within arms readch)

22
Q

What do yoy get at intermediate range?

A

Powder tattooing: unburt propellany, individual reddish brown punctate abrasions, rim of bruising (vital reaction ), eccentric pattern if angled entry, raches up to 30-45 cm

23
Q

What is distant range?

A

Beyond arms length so beyond 1m

24
Q

What do you see at distant range?

A

No propellant, flame or soot, bullet is on its own, skin defect with marginal abrasion

25
Q

Compare entry vs exit: shape of defect?

A

Entry: circular
Exit: irregular

26
Q

Compare entry vs exit: diamter?

A

Entry: less than bullet
Exit: wider than bullet

27
Q

Compare entry vs exit: abrasions?

A

Entry: abraded margin
Exit: no abrasion (shored)

28
Q

Where are gunshot residues deposited

A

On radial side of firing hand