Some of the older threads explain the horizontal method using the Manson gauge thoroughly. I don't remember whether there are pictures. I have been through years of using the "hanging from the ceiling" method, but it didn't work unless I was at home. I settled on the horizontal method. A bag of shot is hard to find at a gun show or someone's home, not yours. It is better to have a human being holding the barrels in place over a well padded surface. Jon Hosford showed me how to use the Manson gauge horizontally. He realizes that not everyone can afford to buy his gauge. What a generous move on his part.
