The above points are valid. To begin with, many base powders are not the 97% purity as touted (if you test them, they are typically 90-95%). Most UG labs do not take this into account and so products are typically underdosed at least 10%. Your better UG labs make adjustments and at least try to compensate. Ross is right, though. I remember when Test cyp 400 + Deca 200 + dBol 20 mg QD was considered a "heavy" cycle.