Jared used to shoot cans in the desert with a buddy.
Wow. He plinked at cans and thus was able to score 30 hits with 30 shots. Of course! Why didn’t I think of that? Anyway the victims were not grouped in a tight circle while they waited to get shot:
http://www.nytimes.com/2011/01/15/us/15medical.html?_r=1&pagewanted=all
The victims dropped where they stood, forming a row 20 or 30 feet long.