This is part of the reason that people have been complaining about shotguns so much lately.
The Iron Banner shotgun is called Felwinter's Lie. Which by itself is a great shotgun. It's only real downside is it's rate of fire. As in, if you don't kill with the first shot, you don't have great odds of making it to the second.
Anyway, so this thing went on sale 2 months ago (February's IB). Once people got hold of it, they rerolled it until they got the super crazy helpful shotgun perks.
So Felwinter's Lie with:
- Rangefinder (Increases effective Range while using ADS)
- Shot Package (Reduces the size of the cone of damage, but increases the Damage and Range)
- Send It (Greatly increases Range)
Thus the great Shot Gun fest of 2015 was born.