The two cartridge that was tested was the overpowered 7.62x51 or the intermediate 7x43 (.280 british). US pointed that the british 7x43 was underpowered and the british that the 7.62 was too much, but because US was the main producer for NATO and desire for uniformity from Churchil the 7.62 was chose. The U.S. eventuatly changed from the 7.62 to the 5.56 due to Vietnam and change in the weaponry and military mentality.
So, what if U.S. decide to suck up their national pride and accept the intermediate cartridge as NATO standart ?
So, what if U.S. decide to suck up their national pride and accept the intermediate cartridge as NATO standart ?