I have found the Wolf to be the cheapest and it does work great in my AR. I have seen some post that they didn't like it, but the stuff i got works fine. I think after doing some shooting with some friends, that the difference in the Wolf they complained about and the Wolf i like is that they had the Wolf ammo that had a lacquer coating on it. The new Wolf i got didn't. Not really sure though. But for the price, i will buy the Wolf any day. I have gotten some from ammunitionstore.com at a resonable price. I can't remember where else i looked. Hope this helps.