The RCBS Expander/Decapping Assembly for 7mm (part no. 9809) replaces the internal decapping and neck-expanding components in your RCBS sizing die. An ultra-hard carbide expander button, mounted on an adjustable positioning sleeve, sizes the case neck to the correct inside diameter while the decapping pin knocks out the spent primer on the same stroke. Reloaders working 7mm brass in volume use this assembly to replace a worn expander button without buying an entirely new sizing die.

Key Specifications

• Sized for 7mm cases, matching the neck diameter and flash hole of this cartridge.
• Features an ultra-hard carbide expander button that resists wear far longer than a plain steel button.
• The expander button rides on an adjustable positioning sleeve, letting you fine-tune how far it enters the case neck.
• Deprimes the spent primer and expands the case neck in the same die stroke, saving a separate expander-die pass.
• Fits into your existing RCBS sizing die as a replacement assembly rather than requiring a whole new die.
• Weighs approximately 0.5 oz shipped, light enough to keep several on the bench or in a range bag.

Frequently Asked Questions

What caliber does this fit? This expander/decapping assembly is sized specifically for 7mm cases.

What is the expander button made of? It uses an ultra-hard carbide button, which holds up to far more cycles than a standard steel expander.

Buy the RCBS Expander/Decapping Assembly 7mm

Restore correct neck expansion and depriming on your 7mm sizing die. Order from our reloading equipment lineup and our Lubbock, Texas team can help confirm the fit for your press.