Once the string and cables are shot in well and stabilized, the Duallys will stay where they are for a long time. The string will stretch some, gaining draw weight and draw length but not much. I shot my '03 Pat Dually about 300 shots or so before I timed the cams but before I did, accuracy and consistency was very good. Lots to be said though about consistent anchor and back tension, if the shot sequence is consistent, impact will be also. Good luck with what you choose!!!