I've never ran more than 1.5cc's for each individual tricep injection. I could probably get away with a little more on the outside heads, but for the larger tricep muscle that is underneath the arm 1.5cc's hurts like a bitch. I still do it off and on, but man the pain that I get in the back of my arms is like no other. Sometimes it even hurts so bad my body develops a slight fever and feels flu-like. The shit we'll do to get big.