Against Sodapop's advice, I shot up about 350 rounds of Chilean surplus, stamped 72-74, through my FAL. I had just bought 1000 rounds the day before he posted here to tell somebody else to watch out for it, so I was kinda stuck with it for time being.
Accuracy was sub-par. My normal 1-2" groups at 100yds with SA surplus spread out to a wopping 10-12" with the Chilean.
Functionality-wise was sub-par also. Athough I didn't get any 'blow-ups', my gas setting was able to be set at a conservative 7 (indicating a hotter load), and one out of every 10-15 rounds was a dud.
In all, the only reason I'm remotely happy with the purchase is because I got a good price locally even though it was the weekend after 9-11. Even though I picked it up for $110/1000, I think I'll let the 'good deal' pass me by next time.