I vote primo !!! Never ventured near a gram a week with either primo or Mast but have tried both in the past. Mast seems to be one of those compounds that you reach a point of diminishing returns and i assume thats why i haven't really heard of anyone taking a gram a week.
I would actually be interested in trying primo at a gram a week. Have used it several times with good results but never that much. Its so easy on the body that you can run it high and for long periods of time. its just pricey...