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Four categories of ballistics include internal, transitional, external, and terminal ballistics. Internal ballistics depicts the event occurring from the time of the propellant's ignition until it reaches the end of the gun barrel.

Types of bullets Armor piercing (sometimes with a depleted uranium or other heavy metal core) Armor-piercing fin stabilized discarding sabot round. Cast. Expanding (Hollow point, Soft point)

Not all bullets are created equal. The energy of a bullet is determined by its mass and speed, and its wounding potential hinges on its ability to transfer its energy to a target; even rounds that are similar in size, or look similar, can cause dramatically different damage.

To match a bullet to a particular firearm the examiner looks for two criteria using comparison microscopy: class characteristics and individual characteristics. Class characteristics are measurable features of a specimen that indicate a restricted group source.

"round-nose" - The end of the bullet is blunted. "hollow-point" - There is a hole in the bullet that creates expansion when a target is struck, creating more damage. "jacketed" - The soft lead is surrounded by another metal, usually copper, that allows the bullet to penetrate a target more easily.

Three common bullet types are: Full metal jacket (FMJ) commonly used for target shooting and competition. Hollow point (HP) commonly used for self defense. Soft point (SP) commonly used for self defense.

Knowing what you will use your gun for should help you determine bullet type. Three common bullet types are: Full metal jacket (FMJ) commonly used for target shooting and competition. Hollow point (HP) commonly used for self defense. Soft point (SP) commonly used for self defense.