Abstract: A baler machine including a charging chamber for receiving materials to be baled. The charging chamber has a charging passageway communicating with a baling compression chamber. A compression ram is operable to force material from the charging chamber into the compression chamber to thereby form a bale. The compression chamber has an exit passageway through which the baled material is forced by an ejector ram. A bale release mechanism is mounted adjacent the exit passageway. The bale release mechanism includes a rotatably mounted gate member movable between a normal operating position and a retracted open position wherein the size of the exit passageway is increased to allow the passage of an oversized bale. A power cylinder is operatively connected to the bale release mechanism to move the mechanism between its closed and retracted positions.