Being that it is a double barreled break-action shotgun, it only carries two rounds, and must be reloaded after every other shot. While it lacks the capacity of other shotguns, the advantage the Hunting Shotgun has is the ability to fire both barrels simultaneously with the alternate fire, allowing for double the damage output. This makes bringing down very tough targets much easier, as a large amount of shot can be put out very quickly.
It can only be reloaded when empty, so you must fire both shells before attempting to reload.
On Moon Base it can be used to rocket jump a great distance.