I must begg to differ. Thousands of times a year AR's are loaded with a single round during high power competition. The routine is to drop a round in the open port and let the bolt slam home. The round magicly finds it's way into the chamber. When I first got my AR I was told this and had to try it for myself. While in the field I did it from every angle possible, with the gun pointed down, with it sideways, pointed up, even upside down, every time the shell found it's way home and hit what I was shooting at. That is not saying that the case was always in perfect condition. Some angles were easier on the case than others with pointing down being the best. While hunting with the rifle I did find that the first shell was beaten pretty badly after a day of hunting. This shell was used on targets of oppertunity, cans, clumps of dirt, jack rabbits, when I did my job, the skuffed up, scared up bullet always found it's mark.