5mm round (Fallout 2)

5mm round is a type of ammunition in Fallout and Fallout 2.

Characteristics
A decent round, though it is outclassed by 12 gauge shells and .223 FMJ rounds, since weapons chambered for these ammunition types come into play at around the same time. Still, it is cheap enough to be useful in certain situations where one needs a burst weapon.

Full metal jacket (FMJ)
A softer metal jacket covers a dense penetrator, while the bullet is loaded with a higher powder load, leading to improved muzzle velocity. However, improved performance against armored targets leads to impaired performance against softer targets, as the higher velocity reduces the amount of kinetic energy transferred to the target on impact.

In game terms, it is strictly inferior to the JHP variant, as the damage redyctuib is not compensated for by the reduction in DR, not to mention that the DT of the target will even further reduce damage received compared to JHP.

Jacketed hollow point (JHP)
Hollow point bullets feature a hollowed out shape at the tip of the bullet, causing the bullet to expand upon impact, delivering more kinetic energy to the target and disrupting tissue more extensively. However, this same property also leads to reduced penetrative power, as the bullet will be stopped by armor much more easily due to its properties. A hard metal jacket is applied to JHP rounds to increase bullet strength and create a middle ground between damage potential and penetration.

Although the DR bonus applied by these rounds is noticeable, it is still not enough to make them perform worse than the AP ammo (which should be sold as soon as it is acquired).

Weapons using this ammunition

 * Rifles
 * Assault rifle
 * Assault rifle (exp. mag.)
 * XL70E3
 * Heavy weapons
 * Minigun
 * Avenger minigun