Some thirty years ago, we used to shoot 4 1/2 lb cast-iron training bombs out of a WW2 U.S. 60mm mortar using (I think) 20 ga shotgun shells loaded with black powder. They went approx 200 yards at about 60 degrees of elevation. Fair sport, especially after consuming a half a case of beer...
Oh boy, could I tell you stories about that time..
