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.
Because the DVD is more advanced compared to CDs, people tend to think that all the advantages are in the DVD. Little do people know that CDs also have significant advantages against DVDs as a CD-R. To know the disadvantages and advantages of each one, it is best to differentiate between them. When it comes to their basics, you can easily notice a significant difference when it comes to how much data it can store. DVD-Rs can hold up to 4.7 gigabytes while a CD-R can only hold up to 700 megabytes.