Doses are subjective. But the deal with Primo is this -- slower growth, but more solid growth. More expensive, but less sides. It doesn't have the BOOM factor of testosterone.
Personally, you can make great, safe, keepable gains with 400 wk along with 20mgs D-ball a day for 6 weeks. That, to me , is ideal though some may feel it's too short and too low.
There are a few guys running 200 mgs a day and loving it. Even at that dose, sides are pretty mild. You can just use a natty anti-e supp and not worry about estro related sides. Since Primo is all about itrogen retention, what you grow is mostly pure muscle.
Remember, growing 8 pounds of muscle in 6 weeks may not sound like much, but look at 8 pounds of meat and imagine it on your body. It's quite a bit.