- Caliber: .300 Savage- This two-die set is intended for reloading bottleneck cases, & consists of a Full-Length Sizer Die withan Expander-Decapping Unit, & a Seater Die with Bullet Seater Plug.- The Full-Length Sizer Die brings the case to SAAMI minimum cartridge dimensions- It sizes the outside of the case, de-primes & expands the neck to accept the bullet- The die has vents to prevent case damage caused by trapped air & for excessive lubricant- Headspace is held to minimum tolerances to avoid changing the case body length during full lengthsizing.- The included Seater Die has a built-in roller crimper to secure the bullet at the same time as it's seated