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Die sets for bottleneck rifle and pistol cases come in full length options, which include a full length sizing die and a seater die. When used with a cartridge headspace gauge tool, the full length die will adjust to bump the case shoulder correctly. This die also resizes the case body for chambering and decaps the spent primer before the expander ball sizes the neck to optimal tension. Cases must be lubricated before full length sizing.

RCBS seater dies for bottleneck cases ensure correct bullet seating in both full length and neck sized cases, offering an adjustable built-in crimp ring if desired. With die position adjustments, the seater die can be used with or without crimping.

Full length 2 die sets are fundamental to reloading. Experienced shooters often use them with multiple barrels or rifles after mastering their setup, and we recommend novice reloaders start with a full length die set, learning proper use before trying other types of dies.