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Fackler does have some really good stuff, I use many of his papers as reference and support in my work. He wrote about 300 articles/papers. However, most of his work was in old cup and core bullets and some is not applicable to the better bullets we have today. Using some of his test methods illustrates that his approximations of living things was good, but also that a few of his conclusions are not valid for today's bullets. I use a Fackler box with glycerin and newsprint more than I use ballistic gel. So far, it is the best approximation to measure performance without shooting living things. Water is not a good approximation, and Fackler said so and was instrumental in getting the 10% ballistic gelatin as a test standard.
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