I read that the Polywad spreader does not work with shot larger than number seven. I employed the search function, but could not find the reference. Does it not spread the load, or does it blow a hole in the pattern? I have a lot of the spreaders, and they help make a better crimped load, I think I will use them with magnum shot number six, anyway if they do not blow the pattern. Does anyone have any experience in this regard?