In a double, where two constrictions are available, improved cylinder and modified are a good pairing, especially in fixed-choke guns. If screw-in chokes are an option, try a more forgiving match, like skeet and light modified. Shoot the more open barrel first on the covey rise, then the tighter barrel as the birds make their escape.
The CD and DVD have a single track of data in the form of a spiral, which starts as the center going outwards. The data is stored on the bumps or pits which are then read by the CD/DVD layer. The bumps/pits on a DVD are much smaller than on CD, allowing the DVD to store more data.
A DVD will hold much more information than its predecessor, the compact disc (CD), and therefore can be used for a wide variety of media and storage. DVDs are the media of choice for video and multimedia larger than a standard audio CD. DVD drives read the discs and implement the information received. Types. DVD drives come in many different forms.