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15 terms

Forensics- Chapter 17

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grooves
the cut or low-lying portions between the lands in a rifled bore
rifling
the spiral grooves formed in the bored of a firearm barrel that impart spin to the projectile when it is fired
bore
the interior of a firearm barrel
lands
the raised portion between the grooves in a rifled barrel
caliber
the diameter of the bore of a rifled firearm; the caliber is usually expressed in hundreths of an inch or millimeters
guage
size designation of a shotgun, originally the number of lead balls with the same diameter as the barrel that would make a pound
Greiss test
a chemical test used to develop patterns of gunpowder residues around bullet holes
smooth-bore shotgun barrel
a barrel of a gun that has no grooves or lands
revolver
uses a revolving cylinder containing multiple firing chambers; cartridge cases are not automatically ejected by a revolver
pistols
or handgun, consists of a barrel, a firing mechanism, and a grip; 3 types of shots: single-shot, revolver, and semi-automatic
semi-automatic pistols
can fire several shots without reloading; automatically expels cartridge casings
shotgun
a smooth-bore weapon
rifle
a should-held weapon normally having a long, rifled barrel
barium
a chemical in GSR
antimony
a chemical in GSR