A scope cap includes memory storage for recording and recalling bullet drop compensation data and a visual display. A protective lid pivotably attaches to the scope cap by a hinge to protect the scope cap. The protective lid includes a flange to manually pivot the protective lid about the hinge. The scope cap is mounted to a scope of cylindrical shape; the scope cap is circular in shape to slidably attach over the cylindrical shape of the scope. The scope cap presents an opening which surrounds an ocular lens for viewing a selected target. The scope cap defines a top having a first protrusion and a bottom having a second protrusion. The first protrusion includes a set of scroll keys, a power button, and a backlight button. The second protrusion includes an input button and a gun button.