Firearm Cartridge Case Identification

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18 Questions

Armalite was formed by Charles Dochester and George Sullivan in ______

1950

John M. ______ is associated with the development of firearms

Col. Calvin H. Goddard, MD., OS, U.S. Army is known as the Father of Modern ______

Ballistics

Horace Smith and Daniel B. Wesson formed a partnership in ______

1852

Eugene Stoner was a talented ex-marine and chief ______ at Armalite

engineer

The best double action revolver was produced by Horace Smith and Daniel B. ______

Wesson

The breech face and the striker (firing pin) of every single firearm have microscopic individualities of their own. Every firearm leaves its “fingerprints” or “thumb mark” on every cartridge it fires. The whole principle of identification of cartridge cases/shells is based on the fact that since the breech face of every weapon must be individually distinct, the cartridge cases which are fired are imprinted with this ________.

individuality

The imprints of all cartridge cases fired from the same weapon are always the same, and those on cartridge cases fired from different weapons are ________.

different

TWO (2) GOVERNING CHARACTERISTICS IN FIREARMS IDENTIFICATION CLASS CHARACTERISTICS: Those characteristics that are determinable prior to the manufacture of the firearms. These characteristics are the ______ specifications and are with in the control of man and they serve as basis to identify a certain group or class of firearms. Two bullets with the same class characteristics.

factory

INDIVIDUAL CHARACTERISTICS: Markings peculiar or distinct in a particular firearm. Markings which are determinable after the manufacture of the firearm and whose existence is beyond the control of the manufacturer. Markings which are randomly distributed inside the gun and whose existence is brought about by the tools used in their manufacture and machine operation resulting through wear, tear, abuse, mutilation, corrosion, erosion and other ________ causes.

fortuitous

The identification of cartridge cases/shells is based on the fact that since the breech face of every weapon must be individually distinct, the cartridge cases which are fired are imprinted with this ________.

individuality

The imprints of all cartridge cases fired from the same weapon are always the same, and those on cartridge cases fired from different weapons are ________.

different

Terminal penetration – depth of entry of the bullet on the target. Terminal ballistics phenomenon that may occur may be one or a combination of the following: Indentation. Penetration. Perforation. Ricochet. Fragmentation. Detonation and other related blast phenomena. Combustion and incendiary effects. Ricochet – it is the tendency of a bullet to glance off an object or to skip, like a flat stone thrown out over a water surface. Note: these first four branches deal with the study of __________.

motion

SHOT BALLISTICS – refers to the study of shots from smooth bore firearms like shotgun and muskets. WOUND BALLISTICS – is the study of the effects of a projectile on a target and the conditions that affect them. Primarily concerned with the nature and medical implications of physical injury and shock caused by bullets and explosively driven fragments. 3 Basic Kinds of Gunshot Wound (GSW) distinguished by the proximity of the weapon causing them: Contact – gun muzzle is pressed against, or within an inch or two, of the body. Close Discharge – 6” to 2ft Distance discharge – over 2 or 3 ft. FORENSIC BALLISTICS – study of firearm identification by means of ammunition fired from them.This branch applies ballistics principles to elucidate legal matters. The study of shots from smooth bore firearms like shotgun and muskets is known as ________.

shotgun

SHOT BALLISTICS – refers to the study of shots from smooth bore firearms like shotgun and muskets. WOUND BALLISTICS – is the study of the effects of a projectile on a target and the conditions that affect them. Primarily concerned with the nature and medical implications of physical injury and shock caused by bullets and explosively driven fragments. 3 Basic Kinds of Gunshot Wound (GSW) distinguished by the proximity of the weapon causing them: Contact – gun muzzle is pressed against, or within an inch or two, of the body. Close Discharge – 6” to 2ft Distance discharge – over 2 or 3 ft. FORENSIC BALLISTICS – study of firearm identification by means of ammunition fired from them. This branch applies ballistics principles to elucidate legal matters. WOUND BALLISTICS – is the study of the effects of a projectile on a target and the conditions that affect them. Primarily concerned with the nature and medical implications of physical injury and shock caused by bullets and explosively driven fragments. Forensic Ballistics is the study of firearm identification by means of ammunition fired from them. This branch applies ballistics principles to elucidate legal matters. The study of the effects of a projectile on a target and the conditions that affect them is known as ________.

wound

Terminal penetration – depth of entry of the bullet on the target. Terminal ballistics phenomenon that may occur may be one or a combination of the following: Indentation. Penetration. Perforation. Ricochet. Fragmentation. Detonation and other related blast phenomena. Combustion and incendiary effects. Ricochet – it is the tendency of a bullet to glance off an object or to skip, like a flat stone thrown out over a water surface. Note: these first four branches deal with the study of motion. SHOT BALLISTICS – refers to the study of shots from smooth bore firearms like shotgun and muskets. WOUND BALLISTICS – is the study of the effects of a projectile on a target and the conditions that affect them. Primarily concerned with the nature and medical implications of physical injury and shock caused by bullets and explosively driven fragments. 3 Basic Kinds of Gunshot Wound (GSW) distinguished by the proximity of the weapon causing them: Contact – gun muzzle is pressed against, or within an inch or two, of the body. Close Discharge – 6” to 2ft Distance discharge – over 2 or 3 ft. FORENSIC BALLISTICS – study of firearm identification by means of ammunition fired from them.This branch applies ballistics principles to elucidate legal matters. The tendency of a bullet to glance off an object or to skip, like a flat stone thrown out over a water surface is called ________.

ricochet

Terminal penetration – depth of entry of the bullet on the target. Terminal ballistics phenomenon that may occur may be one or a combination of the following: Indentation. Penetration. Perforation. Ricochet. Fragmentation. Detonation and other related blast phenomena. Combustion and incendiary effects. Ricochet – it is the tendency of a bullet to glance off an object or to skip, like a flat stone thrown out over a water surface. Note: these first four branches deal with the study of motion. SHOT BALLISTICS – refers to the study of shots from smooth bore firearms like shotgun and muskets. WOUND BALLISTICS – is the study of the effects of a projectile on a target and the conditions that affect them. Primarily concerned with the nature and medical implications of physical injury and shock caused by bullets and explosively driven fragments. 3 Basic Kinds of Gunshot Wound (GSW) distinguished by the proximity of the weapon causing them: Contact – gun muzzle is pressed against, or within an inch or two, of the body. Close Discharge – 6” to 2ft Distance discharge – over 2 or 3 ft. FORENSIC BALLISTICS – study of firearm identification by means of ammunition fired from them. This branch applies ballistics principles to elucidate legal matters. The study of the effects of a projectile on a target and the conditions that affect them. Primarily concerned with the nature and medical implications of physical injury and shock caused by bullets and explosively driven fragments is known as ________.

wound

Terminal penetration – depth of entry of the bullet on the target. Terminal ballistics phenomenon that may occur may be one or a combination of the following: Indentation. Penetration. Perforation. Ricochet. Fragmentation. Detonation and other related blast phenomena. Combustion and incendiary effects. Ricochet – it is the tendency of a bullet to glance off an object or to skip, like a flat stone thrown out over a water surface. Note: these first four branches deal with the study of motion. SHOT BALLISTICS – refers to the study of shots from smooth bore firearms like shotgun and muskets. WOUND BALLISTICS – is the study of the effects of a projectile on a target and the conditions that affect them. Primarily concerned with the nature and medical implications of physical injury and shock caused by bullets and explosively driven fragments. 3 Basic Kinds of Gunshot Wound (GSW) distinguished by the proximity of the weapon causing them: Contact – gun muzzle is pressed against, or within an inch or two, of the body. Close Discharge – 6” to 2ft Distance discharge – over 2 or 3 ft. FORENSIC BALLISTICS – study of firearm identification by means of ammunition fired from them. This branch applies ballistics principles to elucidate legal matters. The tendency of a bullet to glance off an object or to skip, like a flat stone thrown out over a water surface is called ________.

ricochet

Study Notes

Field Investigations

  • Technical Examinations of Ballistic Exhibits involve a Firearm Examiner (Ballistician) who is an expert in firearms identification.
  • A Ballistician is accepted by the court and other investigations due to their specialized knowledge, training, and experience.

Development of Firearms

  • The stages of development of man's weapons are:
    • Stones
    • Clubs
    • Knives
    • Spears and darts
    • Bows and arrows
    • Crossbows
    • Guns
    • Missiles

Personalities/Inventors/Manufacturers

  • Col. Calvin H. Goddard, MD, OS, U.S. Army is known as the Father of Modern Ballistics.
  • Armalite is a manufacturing company that produced the Colt-produced M16, which was designed and developed by Eugene Stoner, a talented ex-marine.
  • Horace Smith and Daniel B. Wesson formed a partnership in 1852 and produced the best double action revolver in the world.

Cartridge Case/Shells Identification

  • The breech face and striker (firing pin) of every firearm have microscopic individualities.
  • Every firearm leaves its "fingerprints" or "thumb mark" on every cartridge it fires.
  • The principle of identification of cartridge cases/shells is based on the fact that the breech face of every weapon is individually distinct.

Firearms Identification

  • Two governing characteristics in firearms identification are:
    • Class Characteristics: determinable prior to the manufacture of the firearms, based on factory specifications.
    • Individual Characteristics: markings peculiar or distinct in a particular firearm, determinable after the manufacture of the firearm.

Terminal Ballistics

  • Terminal penetration is the depth of entry of the bullet on the target.
  • Terminal ballistics phenomena may include:
    • Indentation
    • Penetration
    • Perforation
    • Ricochet
    • Fragmentation
    • Detonation and other related blast phenomena
    • Combustion and incendiary effects

Shot Ballistics and Wound Ballistics

  • Shot Ballistics refers to the study of shots from smooth bore firearms like shotgun and muskets.
  • Wound Ballistics is the study of the effects of a projectile on a target and the conditions that affect them.
  • There are three basic kinds of Gunshot Wound (GSW) distinguished by the proximity of the weapon causing them:
    • Contact
    • Close Discharge
    • Distance Discharge

Forensic Ballistics

  • Forensic Ballistics is the study of firearm identification by means of ammunition fired from them.
  • This branch applies ballistics principles to elucidate legal matters.

Learn about the principles and techniques of identifying cartridge cases and shells based on the unique imprints left by firearms on them. Understand how every firearm leaves a distinct 'thumb mark' on the cartridges it fires.

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