the bullet reference would make sense if you didn't listen to any other lyrics, it seems that he's talking about how 30/30 (pants size) and 150 (weight) his high school self remembers how he wasn't believed in. "a dead generation that wouldn't survive" it seems that the song is about highschool haters and where he is now.
ncG1vNJzZmivp6x7rcXRopqipqSav7G%2BxK2YraGfo8Bvr86mZqysn6Oybr%2FOrqloa2BigHF5kG5n