TweetWell some vets will be able to clear this, but it has to do with test levels and fresh receptors. On ur first cycle, you will get great gains from 400-500mg's of test/week, whether u are 170 or 230. After that, typically you will need to up ur dose, because ur receptors have been accustomed to the drug and ur natural test levels could be lower, so you have to compensate by upping ur dose or taking a fair amount of time off. I know this is a basic answer, but someone like Prolangtum will come along and clarify it for you