The RCBS Full-Length Two-Die Set for 7mm WSM (RCBS part no. 31401) resizes bottlenecked 7mm WSM brass back to SAAMI-minimum dimensions in a single pass, keeping handloaded ammunition consistent from case to case. Built as part of RCBS’s Group A lineup covering popular rifle cartridges, this set pairs a full-length sizer die with a seater die so reloaders can size, deprime, and seat bullets without hunting down cartridge-specific tooling. It suits precision hunting loads and everyday range ammunition alike, and drops straight into any single-stage, turret, or progressive press using the industry-standard 7/8-inch-14 die thread.

Key Specifications

• Chambered specifically for 7mm WSM, matching the die dimensions to this cartridge.
• The Full-Length Sizer Die includes a built-in expander-decapping unit that resizes the case and removes the spent primer in one stroke.
• Sizing brings fired brass back to SAAMI-minimum dimensions so cases chamber reliably again.
• The sizer die is vented to release trapped air and excess case lube, helping prevent dented shoulders during sizing.
• The Seater Die includes a bullet seater plug and a built-in roll crimper to lock the bullet in place as it seats.
• Both dies use the industry-standard 7/8-inch-14 thread, fitting any single-stage, turret, or progressive press.
• Headspace is held to minimum tolerance during resizing, which limits how much the case body stretches between reloadings and extends brass life.
• Dies are machined from proprietary die steel for a long service life under repeated sizing cycles.
• As a complete two-die set, it covers the full sizing-and-seating workflow for this cartridge in one box.

Frequently Asked Questions

What does this set include? It includes a Full-Length Sizer Die with expander-decapping unit and a Seater Die with bullet seater plug and roll crimper, everything needed to size and load 7mm WSM brass.

Does it work with progressive presses? Yes. Both dies use the standard 7/8-inch-14 thread, so the set installs in single-stage, turret, and progressive presses alike.

Do cases need to be lubed before sizing? Yes. Like nearly all bottleneck rifle sizing dies, this is a conventional steel die, not carbide, so cases should be lubricated before running them through the sizer to prevent a stuck case.

Buy the RCBS Full-Length Two-Die Set – 7mm WSM

Whether you’re loading precision hunting rounds or keeping a range bench stocked, the RCBS Full-Length Two-Die Set for 7mm WSM gives you a dependable, cartridge-specific way to size and seat brass. Order it from RCBS and browse the full lineup of reloading dies from our Lubbock, Texas gun shop for fast, insured shipping.