Mast is garbage compared to real primo imo. But it's different. Puts on mass if you need it to. But like fletch said, it's usually relabeled masteron/prop/something else. I've experienced that from sources literally everywhere. Most of the time they don't even know cuz they don't test the raw batch. It's just really hard to get legit primo and nobody will be honest about it. I will. Test everything. Even something you get from my source. But yeah if it's real primo, 100% awesome choice.
Man you and Fletcher now have me thinking I need to give Primo another chance.
I ran it once years ago when the H-AS labs was still around and it didn't stand out to me as anything special so I havn't bothered with it since. Same thing with winstrol.
Have ran most everything else many times over.
Makes me think now the primo was most likely bunk.
But I am a firm believer in second chances.
Has your outfit tested the Biomed or Equila primo out yet?
Prices are decent enough I might consider throwing a half dozen bottles in my next order if they have tested out good...