so I have a friend who is a long time reloader and I brought him some once fired Winchester AA hulls. He's running 20 some grains of green dot with 1 1/ 8 oz of 8 shot out of a 391. He sent me a pic today of the fired hulls and thinks the fouling is excessive said there was allot more on the hulls before the pic...Im not sure either way, but he thinks it is. What say you? If it is what could be the possible causes?
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