"Hathcock's 2500 yard confirmed kill with a .50 caliber Browning rifle-longest sniper kill ever documented."
just a side note, "The kill, one of more than 20 unofficially accredited to Canadian snipers during Operation Anaconda in Afghanistan's Shah-i-Kot Valley, beat the 35-year-old record of 2,500 yards, or 2,250 metres, set by U.S. Marine Gunnery Sgt. Carlos Hathcock in Duc Pho, South Vietnam."