Odd choice, you'd think they'd want something that could shoot .338 Lapua.
From the article: "The main difference between the MRAD and other sniper rifles is that it can be chambered in 7.62 by 51 mm NATO, .300 Norma Magnum, and .338 Norma Magnum ammunition, giving the shooter greater flexibility without changing weapons."
https://www.businessinsider.com/us-army-buying-thousands-of-awesome-new-sniper-rifles-2021-3
From the article: "The main difference between the MRAD and other sniper rifles is that it can be chambered in 7.62 by 51 mm NATO, .300 Norma Magnum, and .338 Norma Magnum ammunition, giving the shooter greater flexibility without changing weapons."
https://www.businessinsider.com/us-army-buying-thousands-of-awesome-new-sniper-rifles-2021-3