ballistics - forensics

what is forensic ballistics

examination of evidence from firearms that may have been used at a crime scene

of a bullet is found at a crime is studied

the striations , to look for matches and lands and grooves

if a cartridge casing is found at a crime scene what do they study

firing pin impressions, breechblock impressions and ejector marks

what is a bullet

a projectile, to lead or alloy located in the front end of the cartridge

when the nose of a bullet is covered what is it called

full metal jacket, hard point or ball ammunition

of the lead is exposed at the tip of the bullet what is it called

jacketed soft point

what is the most common material on bullets

steal, gliding metal and copper

when a bullet leaves the barrel of a gun what is left on the bullet

markings after coming in contact with the inside the barrel

what are the marking left on a bullet from the inside of the barrel called

striations

what is packed into a cartridge casing

bullet, primer and gunpowder

when a gun is fired what happens to cartridge

bullet leaves barrel and cartridge is left behind

if you shoot a revolver what happens to cartridge

it stays in gun

what do head stamps show

the brand and caliber

what is a breechblock

created when cartridge pushes backward on breechblock

what are extractor marks and ejector marks

created when casing is ejected from gun

what is a firemarm

portable gun capable of firing a projectile

what were guns originally called

matchlock

what are the two gun categories

handguns and long guns

pistols can be what

semiautomatic and fully automatic

how do semi auntomatics work

carry’s a cartridges, with one pull of a trigger and one bullet is fired

if a gun is fully automatic how does it work

fired repeatedly for as long as trigger is pressed

longuns include what

rifles and shotguns

shotguns fire what

small rounds pellets or singular projectiles called slug

what do the lands and grooves in rifles cause the bullet to do

to spin when exiting the barrel