ENTM 12800 Lecture Notes - Lecture 11: Butcher Paper, 1 Gauge
10 Jul 2017
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Impression evidence: two surfaces coming in contact, harder surface (tool, softer surface (receives impression) 2. the working part of the rearm that contacts the ammunition three main types: a) rim re: center re, pin re, breech face. 1. the back end of the barrel: extractor, pulls casing from the chamber, ejector, ejects spent shell casing through ejection port. Firearms: revolver: shell casings are not automatically ejected, firearms: semiautomatic pistol, shell casings are going to leave. Ballistics: scienti c study of the motion of projectiles, commonly used to describe bullets from when they leave the rearm until they impact a surface. Internal ballistics a) inside the rearm: external ballistics, after the bullet leaves the barrel, terminal ballistics, when bullet hits the target. Viii. bullet v. casing v. cartridge: bullet, projectile that is expelled from a ri ed rearm, casing, container that holds the cartridge components (steel, nickel, or brass, cartridge, un red round = bullet, cartridge case, primer and powder.
