The RCBS 7mm WSM Full Length Die Set (Model R31401) is a precision two-die system designed to recycle fired 7mm Winchester Short Magnum (7mm WSM) bottleneck brass cases back to minimum SAAMI factory dimensions. This completely mechanical handloading tool is engineered for hunters and sport shooters who require ammunition with reliable chambering and consistent headspace. Operating without the need for electrical power, these dies are highly compatible with standard Australian workshop reloading setups.

Key Features

• Full-Length Sizer Die: Features an integrated expander-decapping unit that removes spent primers, resizes the outer dimensions of the case body, and expands the case neck to the exact size required for a new projectile.
• Integrated Air-Relief Vents: The sizer die is designed with built-in vents to prevent case damage or wrinkling caused by trapped air or excess case lubricant.
• Bullet Seater Die: Includes an integrated roll crimper, allowing reloaders to seat the bullet to a precise depth and apply a secure roll crimp to the case mouth in a single operation.
• Standard Threading: Built with a universal 7/8"-14 thread pitch, ensuring seamless compatibility with standard single-stage and turret reloading presses.

Product Specifications

• Model / Part Number: R31401 (also referred to as RC31401 or 31401)
• Cartridge Compatibility: 7mm Winchester Short Magnum (7mm WSM)
• Thread Pitch: Standard 7/8"-14 thread
• Die Box Dimensions: 5.9" L x 4.5" W x 1.7" H (approx. 15.0 cm x 11.4 cm x 4.3 cm)
• Weight: 1.2 lbs (approx. 0.54 kg)
• Required Accessories: Requires an RCBS Shell Holder #43 or equivalent (sold separately)

Who is the RCBS 7mm WSM Full Length Die Set for?

• 7mm WSM handloaders — require the durability of a 1.2 lbs, standard 7/8"-14 threaded two-die set to size fired bottleneck brass cases back to SAAMI minimum specifications, guaranteeing smooth chambering in bolt-action rifles. This RCBS 7mm WSM die set is critical for handloaders who need to run mixed-source brass safely through their reloading press.
• Reloaders requiring full-length case sizing — need a compact solution fitting in a 5.9" L x 4.5" W x 1.7" H storage box that can both size the full case body and seat projectiles with an integrated roll crimper. This RCBS reloading die set delivers these dual operations without requiring additional expansion dies.

Less suitable for: Reloaders firing bottleneck brass exclusively out of a single bolt-action rifle who prefer a neck-sizing die set to prolong case life, or reloaders processing straight-walled cartridges which require a specialized three-die set instead of this two-die configuration.