I would avoid giving Newbie18 advice, he's 18 and it would appear he doesn't know jack shit about lifting.
You don't ask what someone's friggin curl is, you ask what their bent over row, bench press, military press, squat, and deadlift are.
Those matter, curling does not, I rarely curl and I have decent biceps, why? I deadlift, and do my rowing.
Edit: and as a point of reference I would never inject into my bicep. Hit the quads or glutes man.