Abstract: A bullet lubricator device including a grease-holding cylinder defining a bore open at opposite ends, a bullet-holding cylinder defining a chamber open at opposite ends and attached to the grease-holding cylinder with its chamber in flow communication with one end of the bore, and as plunger being received for reciprocal movement within the grease-holding cylinder bore. Closures, actuatable between opened and closed positions, are hingedly mounted on opposite ends of the bullet-holding cylinder chamber. The bullet-holding cylinder is oriented perpendicular to the grease-holding cylinder bore and can receive a bullet of a given caliber or a size-reducing sleeve which adapts the chamber to accommodate a smaller caliber bullet. The grease-holding cylinder bore holds grease therein between a leading end portion of the plunger and the one end of the grease-holding cylinder.