You're filler, no matter what it is, should be added before the shot. That way, the bean or whatever used, being lighter than shot , will fall back from the shot column and not disrupt the pattern. If it where on top the shot I could see where it might mess up the pattern. JMHO. At one time I was reloading brass shells with fiber wads and couldn't hit anything. I was trying a thicker OS card - .060 - so it didn't have to be glued in. I patterned it and was getting a donut pattern. The hole in the center had to be about 12". I believe some guys load a thick OS card and get away with it, but I just use the .028 card from now on. I also found too many cushion wads hurt the pattern. I was using three 1/2" cushion wads trying to build up the load to the top of the brass shell . Went back to one and no more problems.
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Paul Harm
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