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