Jay Menefee at Polywad also suggests using modified discs to fill in the sometimes weak center of the patterns you get with his spreaders. Years ago, I played around with modifying the discs and came up with a method similar to Jay's. Using a one hole paper punch, I'd cut out three semicircles around the periphery of the disc. Results were quite good. No weak centers. These days, I use guns with very open chokes if I want open patterns. But if you have a gun on which you don't want to open the chokes, spreaders are a great option. Can't say I've ever used them with shot larger than 8's, however.
