Thanks
Yes cpa at such low doses wont have any agonist or antagonist activity, as it is written in Wikipedia: "Although CPA is a potent antiandrogen, relatively high doses of CPA are nonetheless required for clinically important AR antagonism."
Even at high doses, chances are that its antagonist activity will be far more than its agonist activity. But its a weak antagonist. But look, cpa shows its antiandrogenic activity mostly by its antigonadotropic effect not by blocking the AR receptors, and since it is a very powerful antigonadotropin, it maximally lowers T levels by 70% at 12.5mg/d
https://en.m.wikipedia.org/wiki/Pharmacology_of_cyproterone_acetate