I wonder if anyone has tried flattening (slightly) the shot to be used in a tight choked gun at close targets? I have figured out a way to do it using an arbor press with a one inch diameter flat ended shaft. I would have to make a metal "tray" an inch wide and as long as convenient. I would fill the tray one level high with shot so that the shot does not flow from one end to the other. Feed the tray an inch at a time from end to end, compressing an inch of shot at a time. You could substiture a drill press for the arbor press. I just happen to have a long handled arbor press that would work. It wouldn't take to long to make enough flattened shot to experiment at the pattern board.