FBI Ammunition & Ballistics

Question 1

What penetration depth in ballistic gelatin does the FBI require handgun ammunition to achieve for approval?

Accepted Answer

12–18 inches

Answer

The FBI protocol requires a minimum of 12 inches and a maximum of 18 inches of penetration in calibrated 10% ballistic gelatin to ensure adequate terminal performance.

Question 2

What does 'caliber' refer to when describing a firearm cartridge?

Accepted Answer

The diameter of the bore measured in hundredths of an inch or millimeters

Answer

Caliber is the internal diameter of the gun barrel, expressed in hundredths of an inch (e.g., .40) or millimeters (e.g., 9mm).

Question 3

What is the primary purpose of hollow point ammunition in law enforcement use?

Accepted Answer

To expand upon impact and limit overpenetration

Answer

Hollow point bullets are designed to expand upon contact with soft tissue, creating a larger wound channel while reducing overpenetration risk to bystanders.

Question 4

What does the abbreviation 'FMJ' stand for in ammunition terminology?

Accepted Answer

Full Metal Jacket

Answer

FMJ stands for Full Metal Jacket, where a harder metal shell encases the lead core, reducing barrel fouling; it is commonly used for training due to its lower cost.

Question 5

What is muzzle velocity?

Accepted Answer

The speed of the bullet as it exits the barrel

Answer

Muzzle velocity is the speed at which a projectile leaves the barrel of a firearm, typically measured in feet per second (fps).

(FBI) Federal Bureau of Investigation Certified Marksman Practice Test

(FBI) Federal Bureau of Investigation Certified Marksman Practice Test

FBI Ammunition & Ballistics