honestly bud - you won't get much, if anything you may harden up a bit, primo is not a strong anabolic on it's own, it's better to bet stacked with some test or Winny - honestly.
As for how much will you gain? Bro, that's like asking how long is a piece of string! So many things will effect the way you grow e.g diet/rest/training etc... also we do not know what you look like nor your stats.
Try it, you may like it. I know a few people who used it as a first cycle and they gained between 12-20lbs on as little as 200mgs weekly. Personally id add something like anavar or winstrol in there at a mild dose as well.
no clomid post cycle.....if you want to call it a cylce
but still it worked
If my "freind" had it do do ever again, he would have taken 300every 5 days,
and maybe he would have thrown in an oral for the first 4 weeks, or front loaded with something at double the dosage like 600mgs for the first 10 days then 300 ev/ 5 days after. becuase it took 4 weeks for the stuff to kick in.
Karma, becuase I wish someone told me this when he started it.