The present invention provides novel method and devices for implementing progressive systems on networked gaming machines and associated network devices. Some preferred implementations of the invention allow a target progressive pool size to be selected and apply payouts such that the actual progressive pool size is not likely to exceed greatly the target progressive pool size. Some such implementations control the actual progressive pool size by applying a function to control percentages of the current progressive pool size payable to players of a wagering game on the networked gaming machines. The function may be a function of a current progressive pool size, target progressive pool size and bet size. The function may cause relatively higher percentages of the current progressive pool size to be payable to players when the current progressive pool amount is greater than a target progressive pool size and relatively lower percentages of the current progressive pool size to be payable to players when the current progressive pool size is less than or equal to a target progressive pool size.