Swole, i hear what you are saying about primo. Its great for lean dry and easy to maintain gains. But for mass, test is best.
Steroid . com :-
"Now this is very interesting. You´ll note that the most fat was lost by the group in this study who used the highest dose (600mgs/week), and the most Fat Free mass, Strength and Muscle Volume was gained, when compared to any of the lower doses studied (14). Basically, the more testosterone you use (and this holds true for almost all steroids), the more gains you´ll get! I know that the previous statement will ruffle some feathers in the "less is more" club, but that´s simply too bad... more test = more muscle, more strength, more size, and less fat."
"And guess what? The more you use the more results you get. And frequently, the more side effects too (3)."
Am J Physiol Endocrinol Metab 2003 Jan 7; [epub ahead of print] Related Articles, Links "Development of Models to Predict Anabolic Response to Testosterone Administration in Healthy Young Men."
"And, since Sustanon is simply a form of (well actually 4 forms of) testosterone, we also know that administration of this compound will produce a dose respondant curve. (10)A what? Yeah...basically a "dose respondant curve" is the fancy way of saying "the more you take, the bigger you get..."
Am J Physiol Endocrinol Metab. 2001 Dec;281(6):E1172-81.
Big Cat:-
"Of course testosterone Enanthate can be stacked with any number of compounds apart from these, but these make the best match (Primo/Deca/Equipiose). When stacking with testosterone, one needs to look at what the other compound can bring. Either it has a characteristic that testosterone doesn't have, or its nominally safer. The testosterone will bring all the mass, so adding another steroid to enhance mass alone, is futile. More testosterone is the best remedy for that."