I would have to agree with Guinness on this one. There are too many instances in battles to count. At the Battle of Cross Keys the 21st GA, 16th Miss., and 15th Ala., with a single volley took down over 300 men of the 8th NY. The most destructive volley of the war.

http://www.foxnews.com/us/2016/11/16/guinness-refuses-to-acknowledge-nras-world-record-gun-activists-say.html