Firearms

Question 1

Ballistics

Answer 1

The study of the trajectory of ordinance and usually studied by the military

Question 2

Cartridge

Answer 2

It is composed of the metal case that contains the propellants (gunpowder) and the bullet itself

Question 3

Breechface

Answer 3

Rear part of the firearm barrel

Question 4

Full metal jacket

Answer 4

Prevents fragmenting

Question 5

Hollow point

Answer 5

mushrooms on impact

Question 6

Barrel

Answer 6

Made from drilling the center out of a solid steel bar

Question 7

Spiral grooves (Rifling)

Answer 7

A series of spiral grooves in the barrel

Question 8

A broach cutter

Answer 8

Drills the grooves inside the barrel to give the rifling

Question 9

Lands

Answer 9

The grooves are the deeper cut. The surfaces of the original bore remaining between the grooves are called the land

Question 10

Caliber

Answer 10

The diameter of the original barrel, before rifling was added

Question 11

Guage

Answer 11

Size designation for the number of lead balls with the same diameter as the barrel that would make a pound.

Question 12

Gunshot residue

Answer 12

Gunpowder residue that is left behind as a gun is fired

Question 13

Distance determination

Answer 13

Process of determining the distance between the firearm and a target based on the distribution of powder patterns or the spreads of a shot pattern

Question 14

Primer residue

Answer 14

A more specific mixture than gunpowder.
Greiss test used to develop patterns of gunpowder residues around bullet holes but primer residues are typically tested for on hands

Question 15

Temporary cavity

Answer 15

Occurs from expanding gases. Radial stretching of the tissues near the projectile lasts a few seconds and can be large. Tearing tissue and destroying organs

Question 16

Permanent cavity

Answer 16

Actual crushing of tissue and bone caused by the bullet itself. It is only the size of the bullet and is usually less severe