Craig Harrison - The Longest Kill: The Story of Maverick 41, One of the World’s Greatest Snipers
Harrison, callsign Maverick 41, sniper, British Army cavalry sergeant, on Nov. 1st 2009, in Afghanistan, scored the longest sniper kill ever: 2.475 metri!
LThe distance is confirmed bi laser measurement by an Apache helicopter the day after.
He did it with an Accuracy International Arctic L115 A3 8,59 mm bolt action rifle.
The same story told in youtube is here