I was once told, before I even joined here that the bow has "memory" and leaving it cocked all day would weaken it and it would not shoot the same. I left my old Horton cocked for two days intentionally once and then shot it off a rest at target and it shot just fine. But like Tom said I see no problem leaving a CB cocked all day for a long hunt. But I also see no need to leave it cocked from one day to the next. It did not affect my older Horton, but there is also no logical reason to leave one cocked from one day to the next. I don't think one should ever be left cocked when it is out of your direct access and supervision.