RCBS Matchmaster Competition Seater Die Features The exclusive loading window is the feature reloaders notice first because it lets a bullet be dropped into the die and seated by simply running the press ending the familiar routine of balancing a projectile on a case mouth with fingertips inside the ram s path. That internal sleeve does more than save fingers holding the bullet in perfect alignment with the case and guiding it throughout the seating stroke so runout is controlled by the tooling instead of by the operator s touch. Concentric ammunition is the single most repeatable accuracy gain available on a bench and it comes from exactly this kind of mechanical alignment. For a competitor loading a long string of match ammunition in one sitting the loading window turns a slow fussy step into a rhythm. The die body is case hardened steel with a standard 7/8-14 thread so it drops into any conventional single stage or turret press without adapters or shell holder gymnastics. Every internal surface is precision drilled reamed and then hand polished and the deep blued exterior finish is more than cosmetic since it adds a corrosion resistant layer to a tool that lives in a humid basement or garage shop for decades. As a stand alone seater it pairs with an existing sizing setup letting a reloader upgrade the most accuracy critical step of the process without replacing a working die set and RCBS backs it with a limited lifetime warranty on a product made in the USA. For handloaders chasing repeatable seating depth in .300 WBY the RCBS Matchmaster Competition Seater Die is available for sale at GrabAGun. RCBS Matchmaster Competition Seater Die Specifications Brand: RCBS Model: Matchmaster Competition Seater Die Type: Bullet Seating Die Reloading Caliber: .300 WBY Material: Case Hardened Steel Finish: Deep Blued Thread: Standard 7/8-14 Adjustment: Large Oversized Micrometer One Thousandth Increments Seating Stem: Free Floating Self Centering Additional Features: Bullet Loading Window with Retention System Warranty: Limited Lifetime Country of Origin: USA Available At: GrabAGun