A baler (10) having a reciprocating plunger (30) within a main bale chamber (26) for compressing crop material (52) into bales (54). The plunger (30) has a first guide mechanism (76) for permitting linear movement within the main bale chamber (26) that allows a pivoting of an end face (66). A second guide mechanism (78) includes a slot (64) allowing the plunger (62) to be oriented so that the second edge (70) of the end face (66) compresses crop material first and then subsequently pivots to compress equally and finally to have the second edge (70) leading the first edge (68) of the end face (66) away from the bale (54) to provide greater bale compression without additional force.
