The RCBS Expander/Decapping Assembly is a case-preparation tool designed to work with sizing dies to de-prime cases and expand necks on bottleneck cartridges. It combines an expander rod and ball with a decapping pin and an ultra-hard carbide expander button to support consistent case neck sizing. The unit is supplied as a single assembly intended for use in reloading and case-prep workflows.
Key Specifications
- The listed dimension is 0.30 X 2.55 X 5.10.
- The listed height is 0.3000.
- The listed width is 2.5500.
- The listed length is 5.1000.
- The product is listed for .223 REM/5.56 NATO fit/size.
- The finish is specified as Gray.
- The material is specified as Metal.
- The package quantity is 1 unit.
- The product type is listed as Decapping Pin / expander assembly.
- The listed size entry is .223/5.56mm.
This expander/decapping assembly provides a straightforward, durable option for reloading benchwork where consistent neck expansion and reliable primer removal are required. Its compact form and carbide expander button are intended to support repeatable case preparation during reloading and maintenance tasks.
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.




