I think it's a grand idea. A few rules were proposed in May in this thread (post #4 above); would you be interested in adding "no fillers?" Do I draw the 12" circle before, or after I shoot? Will you be an official?
Same wads and powder as above, here with eight 00 buck reclaimed from old shot shells. A big greasy wad strike is at right edge of white:
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The 00 buck are .330 dia., 55 grains. Also trying five .380" dia. balls, 83 grains each:
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What do I win?