Any steroid can be used in a bulk cycle. But if you expect Masteron to be anabolic it’s really not. It will bind to SHBG to give you more free hormones and thus virtually increasing your dosage or making it more effective. It can also help stave off SOME estrogen symptoms for SOME people. It’s a wonderful tool to prevent gyno in the right amounts, and It will make you horny as hell. But it really will not build much muscle on its own unless maybe you’re a female but it’s not recommended for females anyway.
Masteron is a mostly androgenic hormone. It’s anabolic rating is very low, but it has its chance in any cycle to help no matter what your goal is.