If your intent is to open patterns with brush wads, I wouldn't bother, at least in my experience. I have not noticed any significant degree of pattern change with brush wads as compared to shot cups. Maybe 5% at most. Polywad spredr's however, are the cat's meow, and I use them regularly in my m/xf Lefever on upland birds with great success (my gun shoots ic/f with them). BP's x spreaders aren't very effective either imo. Too patchy.

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