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Old March 15, 2019, 10:29 AM   #2
Unclenick
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Join Date: March 4, 2005
Location: Ohio
Posts: 16,188
A series string of water in used plastic milk jugs, while not ballistic gelatin, will come closer than dirt to simulating tissue, and doesn't cost anything appreciable to set up.

How much dirt did the pass-through bullet penetrate? Hatcher has a photo of two .30-06 150 grain M1 Ball bullet penetration paths through oak. The first went only about a foot. It was fired at 50 feet. The second was over 30 inches. It was fired from 150 yards. The difference was the first bullet tumbled, turning sideways in the wood, which stopped it fast. Tumbling is much more likely at close range due to initial yaw that hasn't settled out yet, but it's not certain to happen as the bullet might be randomly straight at the moment of impact despite initial yaw.
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