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Old April 22, 2010, 06:07 PM   #11
bobelk99
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Join Date: February 18, 2005
Location: Central KY
Posts: 220
Quote:
Using .30 ball ammo, how thick does the concrete have to be to stop the bullet? I think a standard poured retaining wall is just shy of 8". Is that enough?
What is basis of the question?

Are you asking about using a wall as a safety barrier, or as a backstop for targets at a 'shooting range'?
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