The Peterson Cartridge .25 Weatherby RPM Brass is an American-made, premium unprimed rifle casing designed to deliver maximum consistency and extended reloading life for long-range hunters and precision shooters. Engineered specifically to handle the modern, non-belted, rebated-rim geometry of the Weatherby Precision Magnum chassis, this match-grade brass features an optimized internal volume distribution and a strict wall-thickness uniformity that resists head expansion under high-pressure loads. Peterson's advanced, state-of-the-art manufacturing lines draw each case body to incredibly precise tolerances, providing reliable primer pocket retention and highly uniform neck tension across multiple reloading cycles. Delivered in heavy-duty plastic ammo boxes with protective cell dividers, this premium components package gives handloaders the perfect baseline to achieve stable muzzle velocities and downrange sub-MOA accuracy without sacrificing case capacity to long-bearing-surface bullets. Peterson Brass 25 Weatherby RPM Box of 50 40077-R