I'm not an expert but I think I can shed some insight.
It depends.
It depends on how your body converts test to estrogen. If your body converts it easily, then you just might get it. If your body is resistant to it, then you're safe. The only way to know is to try it and that's not really a good plan.
Even if you're only doing 250mg per week, I think at a minimum you should be on at least .25 mg Arimidex (Liquidex) every 3rd day, preferably every day.
It guess it all depends of how willing you are to take your chances with bitch tits.