come on bro you knew I would get to you sooner or later.
At one time Schering was manufacturing an injectable Primobolan acetate but its bin out of manufacture since 1993 bro...you would be hard pressed to find any source making it and if and when you do its suspect for a lot of reasons...
but if you do find a trust able source for it then injections can be effective up to 4.5 days apart