That is why I haven't shot it yet, the voiding the warranty. I have a friend with a DPMS 20'' upper and he has shot a lot of Wolf through it just fine. If I were you, I'd look into some SS109, XM193 or M855 and hoard as much as you can. The AMMOMAN.COM ONLINE WEBSTORE
At the prices .223 is at, buying a few 1000 rounds of Wolf will save you enough money to buy a second AR. These guns will take a beating, and Wolf wont hurt them. DPMS is one of the few that I've heard say Wolf will void the warranty. Again that just makes me dislike DPMS even more.
I think as long as you only use it for plinking and clean your gun after every outing that it's fine (Don't use it for self defense). As long as you understand that it may or may not cause some parts to wear or break and that it will void the warranty with a few manufacturers.
I doubt that only 500 rounds is going to cause you any problems. I will admit that normally I try and stay away from it but I do on occasion shot it and have some stored for an emergency.
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