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Lecture notes Firearms and ballistics
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Lecture notes for firearms and ballistics module. Detailed equations and examples, as well as terminology explained
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FSCI 5560Firearms and ballistics
Dionte Charles
,Table of Contents
Terminology ..................................................................................................................... 3
Barrels, rifling and twist ................................................................................................... 4
The chamber and the barrel ................................................................................................................................... 4
The firing process .................................................................................................................................................... 4
Rifling ...................................................................................................................................................................... 4
Examining rifle marks ............................................................................................................................................. 5
Twist rate calculation ............................................................................................................................................. 5
Accuracy ................................................................................................................................................................. 6
Forensic analysis of ammunition ....................................................................................... 6
Chambering ............................................................................................................................................................ 6
Headstamp ............................................................................................................................................................. 6
Using the correct ammunition ................................................................................................................................ 7
Cartridge case investigation ................................................................................................................................... 7
Self-loading or single shot mechanism ................................................................................................................... 7
Class characteristics................................................................................................................................................ 8
Individual characteristics ........................................................................................................................................ 9
Shotgun ammunition ID .......................................................................................................................................... 9
Shotgun: Special types ............................................................................................................................................ 9
Large caliber rounds- baton rounds ...................................................................................................................... 10
Conclusion............................................................................................................................................................. 10
The bullet .............................................................................................................................................................. 11
Jacketing ............................................................................................................................................................... 11
Unjacketed ............................................................................................................................................................ 11
Projectile motion ............................................................................................................ 14
Ideal vs real flight path ......................................................................................................................................... 14
Important concepts .............................................................................................................................................. 14
Drag stabilisation ................................................................................................................................................. 15
Drag coefficient .................................................................................................................................................... 15
Wind tunnel experiments...................................................................................................................................... 15
Calculating Cd from wind tunnel data .................................................................................................................. 16
Examples of drag values ....................................................................................................................................... 16
Lecture 5 ........................................................................................................................ 17
, Shooting scene reconstruction vs shooting re enactment .................................................................................... 17
What is the point of reconstructing a shooting? .................................................................................................. 17
Impact scenarios ................................................................................................................................................... 17
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