RCBS X Die Small Base Sizer .308 Winchester
Innovative sizing die that eliminates repetitive case trimming. Features a patented mandrel design that prevents case neck thickening and growth, allowing cases to stabilize below maximum length for consistent reloading.
Revolutionary Case Sizing Technology
The RCBS X Die Small Base Sizer represents a significant advancement in reloading efficiency. Its patented mandrel design fundamentally changes how bottleneck cases are processed, eliminating the tedious cycle of repeated trimming that has long been standard practice.
How It Works
The X Die's specially designed mandrel incorporates both an expander ball and decapping pin. The extremely close tolerance between the mandrel and die neck wall prevents the case neck from thickening during the sizing process—a common problem with conventional dies.
The Trimming Advantage
After an initial trim of .020 inch off maximum length to standardize your cases, the X Die essentially eliminates future trimming needs. Cases will initially grow a few thousandths of an inch when repeatedly sized, then stabilize below maximum case length. This stabilization occurs without discernible loss of accuracy or case life.
Practical Benefits
- Time Savings: Dramatically reduces reloading time by eliminating repetitive trimming
- Consistency: Maintains uniform case dimensions for reliable, accurate loads
- Case Longevity: Extends case life through gentler sizing processes
- Precision: Small base design ensures proper chamber fit
Getting Started
If you're new to reloading this caliber, consider the X Die Small Base Set, which includes both the sizer die and a standard seater die for a complete sizing and loading solution.
