A centerfire cartridge case whose rim diameter is smaller than the diameter of the body of the case is called?
Question: A centerfire cartridge case whose rim diameter is smaller than the diameter of the body of the case is called?
A centerfire cartridge case whose rim diameter is smaller than the diameter of the body of the case is called a rebated rim case. This type of case is used for some high-pressure cartridges that require a larger bolt face, such as the .50 BMG or the .500 Jeffery. Rebated rim cases allow the use of a standard bolt head without increasing the diameter of the cartridge case. However, they also have some disadvantages, such as increased headspace variation and reduced extraction reliability.
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