12.7mm Round

12.7mm round is a rare type of ammunition manufactured by Hauer Premium in Fallout: New Vegas.

Characteristics
The Hauer Premium Show Stopper 12.7mm civic defense round is a consumer-grade pistol round of identical diameter to the military-grade .50 caliber, but less powerful.

Weapons using this ammunition

 * 12.7mm pistol
 * 12.7mm submachine gun
 * Survivalist's rifle
 * Li'l Devil
 * GRA 12.7mm submachine gun

12.7mm round, hollow point
Hollow point bullets mushroom and break up on impact, causing massive trauma on fleshy, unarmored targets. However, this also means they break up when they hit things like armor plate, drastically reducing the weapon's penetrating power.

12.7mm round (junk)
The Junk Rounds perk from the Dead Money add-on was at one point intended to create ammunition of a special subtype. Called "Junk" or "JNK", these rounds all provided the same modifiers regardless of caliber: 0.75x to Damage and 1.5x to Gun Condition. The rounds remain present in game code but are not placed in any locations, and if somehow obtained cannot be used in any weapons, even those chambered for the correct caliber.

Curiously, the presence of 12.7mm JNK rounds indicates that the perk was to provide a recipe for crafting 12.7mm rounds, though the final version of the perk does not include one. This may be a bug or oversight, similar to 12.7mm ammunition's initial absence from most merchant inventories and the lack of a crafting recipe for the ammunition.

12.7mm round, jacketed hollow point
New ammunition to be added with Gun Runners' Arsenal, JHP, or jacket hollow point, retains most of the damage bonus of ordinary hollow point rounds, but with a less severe armor penalty.

Notable locations

 * Vendortron, moderately low levels.
 * Knight Torres, Hidden Valley bunker.
 * The Arms Merchant at the 188 Trading Post semi-regularly sells 12.7mm ammunition.
 * You can find 10-30 rounds in the Bloodborne Cave. Two twelve round boxes, one by each 12.7mm weapon in the cave.
 * Daniel Contreras, Camp McCarran at fairly low levels. Sells in extreme amounts.
 * Cliff Briscoe, Novac at higher levels.
 * Great Khans, Legionaries, and Fiends will occasionally carry some rounds.
 * Quartermaster Bardon at Hoover Dam. Sells in extreme amounts (1,000 at a time).

Bugs

 * Buying Case Box 12.7mm from Gun Runners will sometimes cause the game to crash.
 * 12.7mm rounds couldn't be made at the reloading bench before Patch 1.2.0.31x
 * 12.7mm JHP rounds are simply listed as '12.7mm round (GRA)', lacking any sort of confirmation that they are actually JHP rounds.

12,7-мм патрон