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Page 1: Striations

Striations

http://www.youtube.com/watch?v=22kLp6Wu61s

http://www.youtube.com/watch?v=22kLp6Wu61s

Page 2: Striations

Out of the Barrel

5.This rifling causes the bullet to exit the end of the barrel in a spiral motion.

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Matching Procedure• Fire bullets from a suspected weapon• With the aid of a comparison

microscope, compare these “test fires” to the suspected bullets• Striations must be identical for a

positive match

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ComparisonMicroscope

Two scopes-One Field

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