So right now, shotgun pellets work in a weird way that makes no sense. From my observations, once you fire, they all travel straight on one tile, then spread out to any tile in 3 directions. How a shotgun should actually work is multiple pellets going forward on one tile, then at a certain distance spreading to two tiles. Unless you're using a sawn off shotgun, the pellet aren't going to spread like they currently do.
As of now it's causing shots that should not be possible. The only way this could be physically possible is the round being explosive, which would explode in mid-flight and spew out shrapnel.
For example, in this fluke ops round. The captain was standing in the black spot, while the OP was standing in the red spot. The captain landed easy shots on the OP that made zero sense.
