GT .223 is cheaper than 7.62x39 at SGammo. I really like GT 7.62. It is clean and accurate. Here's some fair priced .223 for anyone looking who doesn't mind plinking steel cases.
http://www.sgammo.com/product/223-5...-fmj-golden-tiger-steel-case-ammo-made-vympel
http://www.sgammo.com/product/223-5...-fmj-golden-tiger-steel-case-ammo-made-vympel