Definition of secede - withdraw formally from membership of a federal union, an alliance, or a political or religious organization Definition of secede - withdraw formally from membership of a federal union, an alliance, or a political or religious organization
A shell casing is a piece of ammunition that is made of metal. It is often brass, but it can be made of other metals as well, and the more durable the better. Shell casings can be made from any kind of ammunition that is fired from a pistol, rifle or shotgun. It is not a bullet, but it is a piece of the larger ammunition mechanism that is loaded into the chamber to be shot.
1 Low brass shells are characterized by a relatively narrow band of metal around the base of the shell. Low brass ammunition is generally less powerful than high brass.  Active shells are formed entirely of plastic, except for a miniature metal button which holds the primer in the center of the case head.