This was a great piece of work. I played with the numbers to do a comparison of penetration to published SD and then to the SD of the recovered bullet after the shot. Makes it clear to me that published SD is NOT an indicator of penetration. Bullet construction, as seen by the recovered bullet SD (how far it opened and how well it retained weight) directly correlates to penetration. (Note: the slope of the curve, not the fact that it's overlaying the penetration shows the correlation). I probably should have left the 80 TTSX and 55 GMX off as they were a slightly different test.

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