http://www.michaelyon-online.com/big-guns.htm
"The Excaliber is fantastically precise – more accurate than any sniper – and can make first round hits on the targets 5, 10, 20 miles away. Recently, we (the U.S.) had a software glitch with the Excaliber rounds which would have made them inaccurate within certain calendar dates. There are still some glitches but there is no doubt that we could use a lot more of Excaliber." He also mentions on very dark nights they fire IR (infrared) illumination rounds.
What is interesting that it has a CEP of 10 meters due to GPS plug in. Awesome photos.