Shotgun Questions

[Olefin]

I forgot but does the game or anything Paul has show what the effect is on damage and spread for a sawed off shotgun versus the standard one? The absence of choke and the shortened barrel contribute to a wider spread of shot than that of a choked full length gun.

So how does the game take that into effect? My character carried a double barreled lupara that my GM ruled was much deadlier at short range than the standard shotgun due to wider spread of shot but not sure if that was a home made rule or if it was per game rules.