The RCBS X Die Small Base Sizer is designed to minimize repeated case trimming for bottleneck rifle cartridges. Its specialized mandrel integrates an expander ball and a decapping pin to streamline the sizing process. The die’s patented geometry is intended to control case length growth after an initial trim of .020 inch off the maximum length.
Key Specifications
- Designed for bottleneck cases to reduce the need for repeated trimming.
- Requires an initial trim of .020 inch off the maximum case length before use.
- The mandrel includes an expander ball and decapping pin attached.
- Patented design eliminates the need for repeated trimming after the initial trim.
- The X Die does not shorten case length; the mandrel reduces growth caused by the case mouth contacting the mandrel during sizing.
- An extremely close tolerance between the mandrel and die neck wall prevents the thickening of the case neck wall during sizing.
- Cases repeatedly sized will initially grow a few thousandths of an inch and then stabilize below maximum length.
- RCBS recommends the X Die Small Base Set (sizer plus standard seater die) for users starting to reload a given caliber.
The X Die Small Base Sizer is a practical solution for reloaders seeking consistent case length control with minimal recurring trimming work. Its integrated mandrel and decapping features simplify the sizing cycle while preserving case neck condition and overall case life. For reloaders who value repeatable results and reduced case preparation time, this die offers a focused, mechanically straightforward approach to bottleneck case sizing.
This description was generated with AI and may contain errors. Verify specifications and legal restrictions with the manufacturer before purchase. Provided “as-is” without warranties or guarantees.
