I was practicing with mine today. Boy, I can see how it would be real easy to do. I also noticed that it was just in certain spots around the rim,very, very soft and thin. I guess that's what happens as mold start to get out of spec. ?
From what I hear to make the rim so big and still make weight the flight plane is the only place that it(weight) can be shaved. Since it is so thin it is much weaker, in your pic it looks like you grab in the same spot everytime u through only a matter of time before that happend, try to grab in differnt spots to avoid this. This ultra thin flight plate is also the reason that the Nuke won't be released in Z plastic ever which is disheartening because I loved my memorial nuke feel grip flight etc, and have since lost it and the three identical weight nukes I bought to replace are not even close to it.
I got 2 nukes on the day of release and one of my hotstamps is pretty much gone too. THe other is lasting...I think only cause it is darker and I don't throw that one as much. But after the second day throwing these things they were disgusting looking. Disc absorbs dirt. They look like the oldest disc in my bag and are actually the newest. You should loosen your grip though man. I have done it recently and have gotten more distance...20ft or so. Plus you won't have to buy your disc from "Hulk Lab"