RCBS Full Length Die Set - Group D - Bottleneck Rifle Cartridge 7mm Rem BR

The RCBS Full Length Die Set – Group D – Bottleneck Rifle Cartridge 7mm Rem BR (part number 34101) is a precision reloading system engineered for shooters who demand consistency in handloaded ammunition. This complete die set delivers the dimensional control required for competitive rifle cartridges, particularly the 7mm Remington Benchrest round favored in precision shooting disciplines where case runout and seating concentricity directly impact group size and reliability.

The set comprises a full-length sizer die with integrated expander-decapping assembly and a seater die equipped with a built-in crimper. The full-length sizer die restores fired cases to SAAMI specification, ensuring proper chamber fit and eliminating bolt-closing resistance on subsequent rounds. The expander-decapping assembly removes fired primers while opening case necks to the correct diameter for bullet seating. The matched seater die with crimper provides consistent seating depth and applies uniform crimp pressure, critical for benchrest and long-range applications where bullet runout and tension variance contribute to velocity spread and shot dispersion.

This tooling is designed for dedicated reloaders working with 7mm Rem BR ammunition—a specialized bottleneck cartridge used in precision rifle competition and custom long-range builds. Operators and competitors relying on handloaded match-grade ammunition will find the dimensional precision of RCBS Group D dies essential for maximizing accuracy potential. The set integrates seamlessly into standard single-stage reloading presses and is compatible with standard reloading benches and component handling systems common to serious handloaders.

RCBS has maintained a dominant position in the reloading die market by prioritizing dimensional accuracy and manufacturing consistency. The Group D designation indicates this set is optimized for bottleneck rifle cartridges in the 7mm bore diameter, and the 7mm Rem BR specification ensures proper fit and function with cases and chambers built to that cartridge's standards. For precision shooters committed to quality control in their reloading workflow, this die set represents the foundation of consistent ammunition performance.