Slam simple. My normal 12 G recipe is 16.5 Red Dot AA Hull Clay Buster 7/8 oz wad. For spreader shells same powder and shot charge, go to Claybusters 1 oz wad which leaves room for a polywad spreader disk on top of the 7/8 oz load. In practice it’s one more stroke on the press. If You want a 1 oz spreader, use a 1 1/8 oz wad.
I substitute a green Gun Club hull for the AA, makes the spreaders easy to identify in a shell bag.
William
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