Dbol's half-life is 2-3 hours; optimal dosing is 6x day. At 180 lbs., you should start out no higher than 30 mgs/day to see how you tolerate it. (What that translates to with Ref-B is anybody's guess, as there is a lot of conjecture about what it's actually dosed at.) You should definitely have nolva on hand for combatting dbol-induced gyno. (dbol makes my nipples itch every time; but still love it!) Clomid will work in a pinch.