https://en.wikipedia.org/wiki/.30-06_Springfield
The 30-06 (7.62×63mm) remained the U.S. Army's primary rifle and machine gun cartridge for nearly 50 years before being replaced by the 7.62×51mm NATO and 5.56×45mm NATO, both of which remain in current U.S. and NATO service.
I never realized those old sticks threw so much metal.