Chapter 13

Question 1

The nominal diameter of the barrel of a firearm

Answer 1

Caliber

Question 2

A complete bullet, propellant, and primer assembly

Answer 2

Cartridge

Question 3

Composed of unburned or partially burnt propellant powder, particles from the ammunition primer, grease, lubricants, and metals from the cartridge as well as the weapon itself

Answer 3

Cartridge discharge residue (CDR)

Question 4

A type of ammunition cartridge in which the primer is in the center of the base of the cartridge case

Answer 4

Center fire

Question 5

A propellant that burns from the outside of the granule inward

Answer 5

Degressive burning powders/propellants

Question 6

A material used to treat propellants in order to slow the rate of burn

Answer 6

Deterrent

Question 7

Experiments conducted to estimate the distance from a firearm barrel to a target

Answer 7

Distance determinations

Question 8

Propellant in which the main ingredients are guncotton and nitroglycerin

Answer 8

Double base smokeless powder

Question 9

Composed of unburned or partially burnt propellant powder, particles from the ammunition primer, grease, lubricants, and metals from the cartridge as well as the weapon itself

Answer 9

Firearm discharge residue (FDR)

Question 10

A presumptive test used in the analysis of GSR

Answer 10

Greiss reagent/test

Question 11

A propellant made by treating cotton with nitric and sulfuric acid

Answer 11

Guncotton

Question 12

Consists of all of the particles that are expelled from the muzzle of a gun following the discharge of a bullet

Answer 12

Gunshot residue (GSR)

Question 13

A series of grooves spiral cut into the barrel of a firearm

Answer 13

Lands and grooves

Question 14

A propellant that burns evenly throughout the granule due to pores and holes that expose more surface area

Answer 14

Neutral burning powder/propellant

Question 15

Made by treating cotton with nitric and sulfuric acids; attaches nitro groups to cellulose

Answer 15

Nitrocellulose (NC)

Question 16

Compounds that originate from the propellant and lubricant

Answer 16

Organic gunshot residue (OGSR)

Question 17

A propellant that burns slowly at first due to a deterrent

Answer 17

Progressive burning powders/propellants

Question 18

Scoring of lands and grooves in a spiral pattern in the barrel of a firearm

Answer 18

Rifled

Question 19

A type of ammunition, typically small caliber (0.22) in which the primer is wrapped around the periphery of the case

Answer 19

Rimfire

Question 20

An older name for KNO3, potassium nitrate

Answer 20

Saltpeter

Question 21

Propellant in which the main ingredient is guncotton

Answer 21

SIngle base smokeless powder

Question 22

Propellant in which the main ingredients are guncotton, nitroglycerin, and nitroguanidine

Answer 22

Triple base powder

Question 23

A presumptive test used in distance determinations and analysis of GSR

Answer 23

Walker test