[DWI] and me went to the range this morning just to fire off some rounds. Really nice day today, sunny with low humidity, current temp is 53º. Anyways, someone had left one of the spinning metal targets there so I figured I'd take a few shots at it with my AR. It was out at about 50 yards so I decided to get in the prone position to fire at it. After the third hit it finally fell down. I had no idea that 223 could penetrate so well. Went right through it and it's about 1/4" thick metal. Needless to say, I was impressed and thought that I'd share. Oh, and this was 55gr remington that I got at walmart. Pics: And I nicked the leg.