.223 FMJ

.223 FMJ is the only type of .223 caliber ammunition in Fallout and Fallout 2.

Fallout

 * Pistols
 * .223 pistol
 * Rifles
 * Colt Rangemaster hunting rifle
 * DKS-501 sniper rifle



Fallout 2

 * Pistols
 * .223 pistol
 * Rifles
 * Colt Rangemaster hunting rifle (Scoped)
 * DKS-501 sniper rifle
 * Heavy weapons
 * Bozar (Big Guns)
 * Light support weapon (Big Guns)

Fallout

 * On the floor at the end of the radscorpion cave.
 * On the floor in Vault 15, next to some boulders on levels two and three.
 * Found in a bookshelf in the Shady Sands guard barracks.
 * Many raiders use the ammunition.
 * Found in the Glow.
 * Found in the The Hub's cathedral\hospital.
 * Given by Michael as part of the daily issue.
 * Can be bought at the Fortress.
 * Killian Darkwater may sell the ammunition.
 * Beth may sell the ammunition.
 * Jake may sell the ammunition.
 * The shopkeeper may sell the ammunition.

Fallout 2

 * Found in various locations in the Sierra Army Depot.
 * Found in the toxic caves.
 * Found in a desk in the second level of Vault 15.
 * Found in the Flying Dragon 8 store.
 * Flick may sell the ammunition.
 * Jo may sell the ammunition.
 * Eldridge may sell the ammunition.
 * Duppo in NCR Downtown often sells the ammunition.

Bugs
In Fallout, ammunition modifiers make the .223 equal to any other kind of ammunition.