Thread: So an AR is a good HD but...
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Old February 14, 2014, 12:02 PM   #7
2damnold4this
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Join Date: August 12, 2009
Location: Athens, Georgia
Posts: 2,526
From FreeHearingTest.com:

.223 from an 18" bbl is 155.5db
9mm from a handgun is 159.8db
.357 magnum from a revolver is 164.3db
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