Yea, but you have to clean out the crud in the receiver. Buy the wrong ammo and you have a real mess.
A little "crud in the receiver" might slow down an AR, but doesn't much bother an FAL. "Ol' Dirty" digested at least 15,000 rounds of 7.62 NATO without being cleaned (and with an occasional toss into the swamp to cool her down ;>), and was still functioning. Here are some sites that have photos of "the crud in the receiver:"
http://www.falfiles.com/forums/showthread.php?s=&threadid=68486&s=d54143a6b85c9b21b7487dde0fcbcc95
http://ronocracy.blogspot.com/2007/02/ol-dirty-texas-legend.html
http://lukesbunker.blogspot.com/2007_09_01_archive.html
;>)