Bench rest dies with full length sizers offer maximum flexibility.The die sizes the case neck and body.Also sizes shoulder to set headspace (length), deprimes, and expands the case neck.It is machined by hand with one-piece reamers.The exclusive elevated e-z out expander ball system makes the difference in this sizing die.Caliber: 300 AAC BlackoutDie Type: SizingDie Series: Bench RestIn Set: 1