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John H. Dillon, Jr. “Module 10: Characterization and Evaluation of Fired…
John H. Dillon, Jr. “Module 10: Characterization and Evaluation of Fired Projectiles.” Firearm Examiner Training, National Forensic Science Technology Center, projects.nfstc.org/firearms/module10/fir_m10.htm.
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Conclusions: express in a formal report in words that most people would understand, while still maintaining technical accuracy of what you are saying
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Microscopic Marks
Reloaded and Handloaded Bullets: marks left by tools reloading a bullet can leave identifiable marks
Effects of Firing: shaving, skid marks, expanded flared bases, blowby, barrel leading, corroded barrels, and lead smears
Bullet Design: coated bullets, exploding bullets, frangible bullets, and sabots
Impact Damage: in cases of extreme damage, trace evidence can be recovered and undamaged rifling marks can be looked at
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Medical and Autopsy Procedures: marks made by medical professionals can alter or destroy marks made by firing the bullet
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Examination
Shot Pellets: shot size can be determined by the weight of pellets, rule of 17
Shotgun Slugs: not dimensions, weight, and design
Wadding Material: note color, dimensions, design, and shot size
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