I have two Century Arms AKs, one is the M74(5.45x39) and the other is a 7.62x39(model is escaping me, it's not a WASR). I love them both!!! I'm an AK guy anyway, love 'em.
I use Tulammo, and Silver Bear mostly... haven't had an issue with either. I've used Wolf(which is Tula) as well with the same results. I have wanted to try Golden Tiger, heard some good things about it, and bad...
I have plans for another AK(WASR 10) and an AKSU!