.44 Magnum

The .44 Round, Magnum is a small guns ammunition found in Fallout, Fallout 2, Fallout 3 and Fallout Tactics.

Fallout and Fallout 2
There are two types of .44 ammunition:
 * .44 Magnum FMJ
 * .44 Magnum JHP

Weapons using this ammunition

 * Scoped .44 Magnum
 * Lincoln's Repeater
 * Blackhawk
 * Mysterious Stranger's .44 Magnum (NOTE: Available only by using the console)
 * Callahan's Magnum
 * Paulson's Revolver

Description
The .44 Round, Magnum is the rarest Small Guns ammunition found in the game (other than BBs, even rarer than the .308 Caliber Round used by the Sniper Rifle). Very few enemies carry weapons that use this ammunition, and as such it is virtually never found on bodies and must be either purchased or looted from stockpiles, where it is still uncommon.

Players who intend to make use of weapons chambered for .44 Magnum rounds would be well-behooved to take the Scrounger perk as soon as it is available. With this perk, although .44 Magnum ammunition remains less common than 10mm or .32 caliber ammunition, significant caches can be found, drastically improving the usefulness of those powerful weapons.

A much easier way to get large amounts of .44 ammo is to download The Pitt DLC and use the Ammo Press after completing Free Labor.

Merchants
Several merchants will frequently have large quantities of .44 magnum ammo in stock (10, 15, even 20+):
 * Chief Gustavo in Tenpenny Tower.
 * Flak 'N Shrapnel's in Rivet City.
 * Sydney after completion with her as a companion in the Stealing Independence quest.
 * Lucky Harith, the Caravan Merchant dealing in weapons (after merchandise upgrades at Canterbury Commons).
 * Smiling Jack in Evergreen Mills.
 * Tulip in Underworld.
 * Knight Captain Durga in Citadel
 * Friday in The Pitt Downtown
 * Moira Brown in Megaton
 * Knick Knack in Little Lamplight

Another good source seems to be Michael Masters in Tenpenny Towers At one point he had 39 .44 Magnum rounds. You'll only be able to trade with him, if you helped the ghouls move into the tower, though.

Fallout Tactics
There are three types of .44 ammunition:
 * .44 Magnum JHP
 * .44 Magnum AP
 * .44 Magnum Ball