A cover for use with an optic device to hold and display shooting information. The cover may have resilient retention members that allow a display to be releasably attached and detached from the cover. The display may be made from a single substrate or multiple substrates in order to make the shooting information contained thereon highly visible in a variety of conditions and shooting preferences. The display may further be customized by a user to include desired DOPE information and then printed onto the single or multiple substrates. A system and method for creating custom DOPE charts is also provided.