http://www.aimsurplus.com/acatalog/308.html
boxer primed stuff
Ive seen a good range report on the lithiuanian. they say it at least as good as the US m60 ball from federal or winchester. It priceier than other offerings but if the quality is there it's worth it.
personally I'll be shooting portugese for a long time
The Lithuanian is NATO Spec ammo. That makes equal to (maybe better than) USGI M80 Ball from the American companies (LC, WW, RA, FC). It probably will rank similar to Hirtenberger, from what I've heard so far, except it's reloadable. The Portugese is well known, and I have to say, Paul is right on that part.
Let me put it this way. IF I was to buy 7.62 NATO, I would buy this stuff FIRST, over anything else, except MAYBE Lake City.
In other words, the ONLY reason I don't buy this is simply because I make my own. And, I'm a professional reloader. My father and I have a business, currently he's the senior partner, when I retire from my regular job (3 years), he backs down some, and I start taking over.
FWIW, I hear AIM isn't the only company selling it. Do your homework, compare prices before buying.