It depends on what you are trying to dissolve. For most long esters, such as an enth or cypionate, BB is not necessary as the esterfied compound is very oil soluble. For short esters, such as a prop or acetate, a BB addition will provide some relief from crystallization at the depot.
If it is a prohormone you are trying to dissolve a better solvent/co-solvent choice would be PEG-400.
Chemo