.....A Senate report said that a bullet from a .50-caliber rifle, even at 1.5 miles, crashes into a target with more energy than a bullet fired at point-blank range from Dirty Harry's famous .44 Magnum......
..... But New York City's Police Commissioner Ray Kelly says the .50-caliber rifle is in a class by itself. He agreed to show 60 Minutes just how powerful the .50 caliber is.
First, a police sharpshooter fired the NYPD's own .30 caliber sniper rifle at a steel target. Downrange, three football fields away, the three shots from the .30 caliber rifle bounced off the half-inch thick steel.
"You can see it hasn't penetrated it," says Kelly.
Then the sharpshooter fired three rounds from a Barrett .50-caliber rifle at the same target.
"Went right through," says Kelly. "It is clearly a weapon of war, a round to be used in a wartime situation. It's appropriate for the military. The effective range is about 2,000 yards. It's a very formidable weapon." ....
http://www.cbsnews.com/stories/2005/01/06/60minutes/main665257.shtml
I'm with joe - this doesn't sound like a weapon that anyone outside the military needs.