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EXCERPTS from BASIC FIREARMS IDENTIFICATION Lucien C. Haag Criminalist Forensic Science Services, Inc. Carefree, AZ Prepared for DCA Vince Imbordino
PRINCIPLES OF FIREARMS IDENTIFICATION CALIBER DESIGNATIONS Caliber relates to the nominal inside dimensions of the barrel
PRINCIPLES OF FIREARMS IDENTIFICATION FOUR COMMON RIFLING ARRANGEMENTS Direction of Rotation Rt Lt
PRINCIPLES OF FIREARMS IDENTIFICATION: Class Characteristics Imparted to Fired Bullets RIGHT TWIST LEFT TWIST
Examples of Fired Bullets Right Twist Left Twist
SLIDE BREECHFACE EXTRACTOR FIRING PIN EJECTOR SOURCES of MARKS on CARTRIDGE CASES
extractor breechface SLIDE removed from a Semi-Automatic Pistol Support Area for the Cartridge
extractor Live Cartridge loaded from the Magazine Slide retracted ejector
ejector mark firing pin impression EJECTOR MARK on an Extracted and Ejected Cartridge Case Impact site Typical ejectors are located at the 7 to 8 oclock position
CARTRIDGE CASE EJECTION from a SEMI-AUTOMATIC PISTOL slide barrel Ejector
STYLIZED BREECHFACES with VARIOUS TOOL MARKS FIRED CARTRIDGES
STYLIZED BREECHFACES and VARIOUS EJECTOR SHAPES FIRED CARTRIDGES with EJECTOR MARKS
Summary of Markings on Cartridge Cases
BASIC FIREARM and TOOLMARK IDENTIFICATION Lucien C. Haag Criminalist Forensic Science Services, Inc. P.O. Box 5347 Carefree, AZ end-
The Canadian Integrated Ballistics Information Network (CIBIN)
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