Top Definition
Taking the first shot from a sniper rifle with a clean barrel. Extremely difficult, you have to anticipate where the shot will go. only after the first shot you can adjust your dope (Data On Previous Engagement). also after a first shot is fired the inside of the barrel will set on carbon residue that will change the flightpath of the bulet.
jim started the ambush with a cold bore shot from 1'500 yards away. one shot one kill.
by speuz July 28, 2011
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