7.62 NATO Ball & .30-06 LC NC

Go here.

Buy as much as you can.

You're gonna need it.

Alea iacta est.

PS: CMP still has delinked Lake City .30-06 M2 ball at $80.80/250 rds, delivered. Pair that with en bloc clips from Pat's Reloading at $45/100 and you will be good to go. Alternatively, buy the Greek '06 in spam cans from CMP at $68.95/240 rds, and you'll get the en blocs, bandos, and cardboards.