Two-die reloading set for .300 Remington Short-Action Ultra Magnum featuring full-length sizer with expander-decapping unit and seater die with built-in roll crimper for secure bullet seating.
This two-die set from RCBS is engineered specifically for reloading bottleneck cases in the .300 Remington Short-Action Ultra Magnum cartridge. Whether you're a precision handloader or a serious hunter, this set provides the tools necessary for consistent, reliable ammunition production.
The Full-Length Sizer Die brings your cases to SAAMI minimum cartridge dimensions for reliable feeding and chamber fit. It accomplishes three critical functions:
Venting ports in the die prevent case damage from trapped air and excessive lubricant buildup—a thoughtful design detail that extends case life. Headspace is held to minimum tolerances, ensuring the case body length remains consistent during the sizing process.
The included Seater Die features a built-in roll crimper that secures the bullet while seating it to precise depth. This integrated design eliminates the need for separate crimping operations, streamlining your reloading workflow.
RCBS has been the trusted name in reloading equipment for generations. This die set reflects their commitment to precision, durability, and consistent performance.