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Old August 23, 2010, 07:38 AM   #5
Senior Member
Join Date: October 18, 2009
Location: Lampasas, TX
Posts: 326
A supersonic bullet makes a sonic boom (albiet small) as it passes through the air. A suppressor helps on the gun end of it, but it is not as quiet as subsonic ammo. They do allow shooting without using hearing protection with regular ammo.
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