The rimprotrudes around the circumference of the head of the case, and is not technically a separate component of the case. I list it separately here because of the unique functions it provides. It is where the rifle’s extractorgrabs the spent case to pull it from the chamber.
The caseis the part of the cartridge that holds all the other components together. Before we talk about all the things that will be stuffed into it, it’s a good idea to know where the stuffing happens! The case is also known as the brass.