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Full length die sets are used for both bottleneck rifle and pistol cases. The set includes a full length sizing die and a seater die. The full length die is adjustable up or down in the press to bump the shoulder of the case to the extent needed. It is recommended to use a cartridge headspace gage tool to achieve the correct shoulder bump. The full length die also sizes the body of the case to make it chamber easily for the next firing, and it decaps the spent primer. The expander ball passes through the neck of the case and sizes it to the correct tension. Cases must be lubricated before using a full length sizing die.

RCBS seater dies for bottleneck cases are designed to seat bullets correctly in both full length sized cases and neck sized cases. These dies have a built-in crimp ring so you can crimp the case into the bullet if desired. To crimp or not crimp, adjust the seater die by raising or lowering the position of the die in the press.

A full length 2 die set is a fundamental component in the reloading process. Some shooters wear out multiple barrels or rifles using only one full length reloading die set. For new reloaders, it is recommended to start with a full length die set and learn how to correctly set up the dies before trying other types of reloading dies.