https://www.gunsamerica.com/blog/americans-set-new-long-range-world-record-5000-yards-2-84-miles/
Getting to the actual shot, Charlie, and his team loaded several 10 round batches that had different amounts of powder. They connected on the 40-inch target when shooting the 7th shot of the 3rd batch of ammo.
This is from that article. As I read it that would be 27 rounds.
First batch of ten would be shots 1,2,3,4,5,6,7,8,9,10
Second batch of ten would be shots 11,12,13,14,15,16,17,18,19,20
Third batch of ten would be shots 21,22,23,24,25,26,27,28,29,30 and shot 7 would be 27 not 37.
The article is very poorly written. That is saying a lot against them as anyone who is good with grammar knows I do not write well at all.