I would bump up that dose to 500 mg sustanon every week for 8-10 weeks for a first time. Many people on this board used 250 mg a week for their first time while some felt it was beneficial many wish they had used 500 mg.
Either way, a good endocrinologist will give a script for 200 mg T a week for HRT, 250 isnt much more than this at all ... its a shame to think you are using "steroids" for little more of an effect than simple high dose HRT
NFG