pattern of the density, they'll give an opinion as to the range. well, this has been used for 75, 80 years, to make judgments. was the problem was, does it really reflect what happens on the skin? and i got curious about that, so i decided to make a determination, and i did experiments. and you have to use living animals to do it. and based on the experiments, i found out that, yes, it's valid. to determine the size of a pattern by shooting against like white paper is valid, out to at least 18 inches. so i got interested in there, with and then i did determinations of powder that to go from handguns and shotguns and rifles and how far it extends and how different types of powder makes such a determination. this is a ball powder variant,