Flashcards in Exam 4 Ballistics Deck (24):
1. It is the rear end of the bore of firearms where the cartridge is inserted in to the chamber.
D. rear of the bore
2. These are spiral grooves cut in the bore of a rifle or pistol barrel.
3. Treats of the effects of the projectile’s impact on the target. It studies the effect of the projectile at the end of its trajectory.
C. Exterior Ballistics
D. Terminal Ballistics
4. It is the straight distance between the muzzle of the gun and the target.
C. maximum range
D. accurate range
5. It is a part of the cartridge case, which serve the purpose of limiting the forward travel of cartridges into their chamber.
A. shell crimp
B. shell cannelure
6. These are grooves which are sometimes found rolled into the necks and bodies of cases at the location of the bullet’s base to prevent it from being pushed back or loosened.
7. The part of the mouth of the cartridge case that is turned in upon the bullet for the purpose of holding the bullet in place.
8. The bottom portion of the case, which contains the head stamps, designed to indicate the name of the manufacturer and year made.
9. The primer with two flash-hole.
10. It is a metallic or non-metallic projectile propelled from a firearm.
11. This class characteristic is dependent upon bore diameter, groove width and the number of rifling and.
A. width of the land
12. A class characteristic which can be determined by measuring the remainder of the circumference after subtracting the groove width.
B. width of land
13. Class characteristic showing the direction of the spiral groove.
A. twist of rifling
14. It is the action of a bullet consisting of a stable rotation while in flight.
15. It is the shortest distance between two sides or edges of a groove.
B. groove width
16. Part of the barrel interior and these are termed as the remnants when the rifling stage is completed.
17. It is the distance measured between two opposite portions of the depressed interior surface of the barrel.
B. groove diameter
18. Characteristic of firearms commonly termed as factory specifications.
A. class characteristics
19. The elevated portions of the barrel in the fired bullet cause these.
B. land marks
20. It is also known as caliber.
21. Most commonly these are found on bullets fired from a revolver due to poor alignment of the cylinder with the bore.
22. In the campaign against the fanatical natives of the north-west frontier of India at the close of the last century of English army, they invented a kind of bullet which were called DUM-DUM or otherwise called expanding bullets, they are ;
C. incendiary bullet
23. When two specimens are compared under the comparison microscope at the same direction, the same level, the same magnification and the same image , they are called;