And 7.62x54r, but that caliber does my internet handle a disservice.
The tools that employ the 7.62x51 are much more reliable.
It appears I have some surplus rounds from my Y2K dump;
just as Y2K, I suspect It will be largely undisturbed following the event.
I switched from 5.56 to 7.62x51 after y2k and had a hell of a time at the range gettin rid of the 5.56