Greek surplus ammunition. Range was 100 yards. There were several failures to feed, but other than that, it ran well. I'm going to field strip and clean and lube the heck out of it and that should make a difference. I'm also going to change out the op rod spring. The first four clips were everywhere, but mostly low and left. I adjusted the sight for the last clip and this photo shows the results. The wind was coming up, and we had shot for a while, so we called it a day.