A friend of mine has 20 acres north of Bowie and has a nice deep valley that he has set up a firing range with 50, 100, 150, 200 and 300 yd targets. Since I'll be out of town next weekend we decided to have a little shoot this weekend. All shooting is done down in the valley with the nearest homes over a mile away with several hills in between.  I took my new precision shooter along with my SAR 1 that I purchased last weekend and we blasted away for three hours.  1000 rds between us were expended!  

http://www.ar15.com/forums/topic.html?id=126771