The graph is based on data from the Sciuschutti (SP??) study that was published a few years ago. He fired multiple brands of bullets, three at each impact speed, and took the mean. So each point you see is the mean of three bullets. Vertical axis is penetration in inches.
Part of the test was that he fired bullets into roadkill deer, and verified that the mean penetration in wet phone books is about the same as mean penetration in roadkill deer. However, as you were hinting, the variability of penetration in actual deer is much greater than the variability in phone books... i.e., phone books give you a nice, tight distribution, while actual deer give a much broader distribution... more variation.
Last edited by denton; 10-24-2005 at 12:17 PM.
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