Brunswick Siege BUY THIS BALL AT ROWE ZONE BOWLING STORE TODAY FOR $149.95 ( INCLUDES DRILLING ). Siege The Siege unites the new Propel coverstock and the MACE core to produce a ball motion that is both aggressive in the oil and aggressive in the backend. The Siege is your ball when your game needs help battling heavy oil conditions and poor pin action. Coverstock Introducing Propel coverstock the...