At medium range (7 standing zombies or less) it will often result in a 1-hit KO regardless of where you aim. It is speculated that each shotgun pellet is equal to the damage of a single handgun round. At close range it will result in incapacitation of the zombie aimed at.
Be careful however when giving shotguns to fellow survivors as the shotgun's friendly fire can do a lot of damage to Chuck.
The shotgun appears to be based on a stainless steel Mossberg 500 Cruiser. (But can easily be mistaken for the Remington M-1100p crusier shotgun as well.)
When Chuck equips a Shotgun, he will pump it immediately.
There is a bug that prevents Chuck from pumping his shotgun, however the pumping sound is still heard. To fix it, just fire it and reequip it again.
The shotgun-wielding guards are not present in Off the Record except in the tunnels , making the weapon considerably harder to find.
The shotgun in Dead Rising 2 has 10 more shots than the shotgun in the first Dead Rising.
The Shotgun is the best firearm to be used against psychopaths.