The Terrible Shotgun

The Terrible Shotgun is a weapon that only appears in Fallout 3.

Characteristics
It is a unique variant of the Combat Shotgun and has the highest base damage of all weapons in the Small Guns category.

Location

 * It is in the possession of Smiling Jack in the Evergreen Mills bazaar.

YouTube video: Gz57ZM2eDfA

Weapon characteristics

 * The Terrible Shotgun has a larger spread than normal shotguns; it does more damage if all pellets hit, but it is harder for that to happen because its accuracy is lower than the combat shotgun.

Strategy

 * The best way to use this weapon is for point blank shots. Be prepared to charge headlong into enemy fire if this is to be a primary weapon.
 * Shots from ten feet away throw pellets so randomly that it will occasionally dismember different body parts of the victim, even though the player might be aiming for the head of an opponent. Although there is a large cone-like spread of fire that is released when the trigger is pressed, a high concentration of the burst must hit the target to deliver maximum damage.
 * If using The Terrible Shotgun in V.A.T.S. aiming for the chest is always a tactical choice. The spread of the shotgun will most likely hit some kind of vital appendage, still dealing maximum damage.
 * However, The Terrible Shotgun does have unrivaled stopping power (80 dmg vs a regular combat shotgun's 55 dmg when Small Guns skill is capped at 100).
 * Its ideal usage is either for fast moving animals (Deathclaw or Yao Guai), room to room fighting, or for other near point-blank confrontations. In other words, this gun is best suited for use in urban environments with occasional application in wilderness.
 * This weapon receives as much as (+40) damage on a critical strike. Consider using this instead of a melee weapon for sneak attacks.

Obtaining the gun from Smiling Jack

 * You can kill him (no Karma effect) and get not only his gun but all his inventory, in which case you should sell him as much of your inventory first as he has caps, then you get back your stuff and still all the caps which he doesn't seem to have on him otherwise.
 * You can engage him in combat, the goal being not to kill him, and just shoot it out of his hand, and picking it up before he does. Leave the Bazaar and come back after a minimum of 72 hours. This is the time it takes for an NPC or group of them to "forget" about the trouble a player might have caused. Return, and you still have a valuable business partner.
 * Possibly the most effective and quickest way of obtaining the shotgun, pickpocket his shotgun ammunition, leave the Bazaar, save the game then reload and re-enter the Bazaar. The gun will then be an available item in his inventory and can now be pickpocketed (possibly a glitch).
 * Its also possible to break the Terrible Shotgun with an aimed-shot, then put your weapon away to end the fight, at this point you've forced the gun into Jack's inventory. You can now pickpocket it with no affect on your trading relationship or karma.