FBI Ammunition & Ballistics 2

Question 1

What is 'bullet drop' in external ballistics?

Accepted Answer

The downward deviation of a bullet's path caused by gravity

Answer

Bullet drop is the downward curve in a bullet's trajectory caused by gravity continuously pulling the projectile downward during its flight.

Question 2

Why is 'overpenetration' a critical concern for FBI agents in populated environments?

Accepted Answer

A bullet that exits a target continues traveling and may strike unintended persons

Answer

Overpenetration occurs when a bullet passes completely through the intended target and continues, posing a lethal threat to bystanders or other unintended targets.

Question 3

What factor most significantly determines a bullet's ability to retain velocity at long range?

Accepted Answer

The bullet's ballistic coefficient (BC)

Answer

The ballistic coefficient (BC) is a numerical value that quantifies how efficiently a bullet overcomes air resistance; a higher BC means the bullet retains velocity better over distance.

Question 4

What is the primary purpose of rifling in a gun barrel?

Accepted Answer

To impart spin on the bullet for gyroscopic stability and improved accuracy

Answer

Rifling consists of helical grooves machined into the bore that spin the bullet as it travels down the barrel, providing gyroscopic stability and dramatically improving long-range accuracy.

Question 5

Which standard handgun cartridge did the FBI adopt in 2015, replacing the .40 S&W?

Accepted Answer

9mm Luger (9x19mm)

Answer

The FBI transitioned back to the 9mm cartridge in 2015, citing modern hollow point advancements that equaled .40 S&W terminal performance, combined with reduced recoil and higher capacity.

(FBI) Federal Bureau of Investigation Certified Marksman Practice Test

(FBI) Federal Bureau of Investigation Certified Marksman Practice Test

FBI Ammunition & Ballistics 2