Seems like DARPA has come up with a laser tracked .50 round for use by snipers.
"The .50 caliber target tracking bullets, dubbed Extreme Accuracy Tasked Ordnance (EXACTO), are designed for military snipers, who must deal with changes in wind, light and ambient heat as they fire on a target."
Story here http://www.computerworld.com/s/article/9249685/The_agency_that_brought_you_the_Internet_has_created_a_self_guided_bullet
Interesting stuff.
"The .50 caliber target tracking bullets, dubbed Extreme Accuracy Tasked Ordnance (EXACTO), are designed for military snipers, who must deal with changes in wind, light and ambient heat as they fire on a target."
Story here http://www.computerworld.com/s/article/9249685/The_agency_that_brought_you_the_Internet_has_created_a_self_guided_bullet
Interesting stuff.