I have not purchased ammo off the internet. The last ammo I purchased in .308 was about 3 months ago at the gun show here. I picked up 2 cans of linked LC 91 and one can of linked .223 LC 97 (can marked UAE -- very interesting - was told it was from a contract overrun) and a can of 20 round cartons of .233 LC 89. At that time I also picked up a couple of boxes of Georgia Arms BTHP which has been comparable to the Federal Gold Medal. My local store had linked and loose LC 70's vintage as of last month in isreali marked cans.
http://billstclair.com/ammo.html seems to be a pretty comprehensive list of sellers, including Georgia. One dealer lists US and Isreali .308 in inventory, another has the Austrailian in clips and bandoleers and cans.
I wouldn't hesitate to shoot brit, austrian, austrailian, isreali, but I wouldn't feed anything from South/Central America, former eastern block, African or Mid-eastern countries (turkey, pakistan etc).