I would not suggest an increase from 1st to 2nd cycles. Wait til the 3rd and bump it up to 700-750mg/wk. Hey WarTime, if you say you want to do 400mg/wk and you did 600mg/wk 1st cycle, you are lowering your dosage bro!! If you got testosterone propionate 100mg/mL you could effectively take 400mg/wk at 1cc EOD, OR 1/2cc ED(Which its FAR better inj ED to stabilize blood levels) and end up with more potent test in your system yeilding almost NO estrogen side effects. Props the BEST (IMO) +HGH