well I can't say for it sounds like you have more experience.
it basically solidifies the gains you make in the gym minus the water retention, and other heavy sides of adrogens
thats why the adrogens are used in pill form (dbol) its used for the intensity it gives, plus the anabolic spike, that is needed around workout time. its out of your system in 9 hours or less...i think working out actually dissipates the androgens, so your hpta, and other aspects of your endocrine sytem are spared.
the primo is just there to make sure your in a positive nitrogen state the whole time, hence the gradual gains, minus the sides.
I mean they prescibe primo in the medical community at even less of a dose for patients to gain lean mass