Didnt realize those were used as sniper weapons or that they had a semi automatic setting.
Im guessing it was not a Ma Duce, thinking a Barrett or something like that. Cant rely on reporters to get the technicals right on something like this.
It probably went something like this:
Reporterette: “What bullet are you using?”
Sniper: “50 BMG, Ma’am.”
Reporterette: “What does ‘BMG’ stand for?”
Sniper: “Browning Machine Gun, Ma’am.”
Reporterette scribbling notes: “Shooting machine gun.”
White Feather did so in VN, so this chap may very well have done so too.