My local range has a 100 yd indoor rifle range. Several months ago, I was there one morning trying out some new loads in my 308 PSS. Some dude walks to the lane two down from me, gets out an AK and slaps in a 30 round clip. He does not bother to send a target downrange, but instead starts hammering away. I did not notice his first two shots as I was busy shooting, but I did notice shots 3,4, and 5 send sparks fly the side of the concrete wall about 50 feet down. The guy quits, cases his rifle and leaves. About 15 minutes later he returns. Slaps another 30 rounder in the rifle and starts shooting. This time I stepped away from the line. All three shots hit either the floor or the wall about 10 feet away and sparks went everywhere. He then left and never came back. What a doke.