I was looking for some photos of a 276 Pedersen cartridge (most are headstamped F A 29)
and found a few photos.
Looking back, even if the US Army adopted the 276 cartridge as an infantry rifle, would they have converted the Browning Model 1917A1 water cooled m/g to 276 caliber and the BAR Model 1918 ? I doubt it.
photo showsAttachment 120169 7,62x51 NATO and 276 Pedersen