[ghostcat]

Yep. funny how history seems to repeat itself. If I remember correctly the U.S. Military had planned to go with a 270 caliber sometime after WWI but weren't able too because of the cost and the huge stockpile of 30-06 left in inventory at the close of WWI. In fact according to Julian Hatcher, the M1 rifle was originally designed for that caliber.

[headstamp]

276 Pederson.

The Pederson device was a unit that made the Springfield bolt action rifle into a semi-auto firing this round.