Peterson Brass 6mm GT Casings are precision-manufactured reloading brass purpose-built for the handloader who demands the utmost in consistency and accuracy from one of the most exciting modern precision rifle cartridges. Developed in collaboration with competitive shooters, the 6mm GT has quickly earned a reputation on the PRS and NRL circuits for its exceptional efficiency, mild recoil, and outstanding long-range performance — and Peterson Brass is the ideal foundation for unlocking its full potential. Drawn from high-quality brass and held to exceptionally tight tolerances, each casing delivers uniform wall thickness, consistent neck tension, and precisely machined primer pockets for reliable ignition and repeatable performance load after load. Built to withstand multiple reloading cycles without compromising accuracy or structural integrity, Peterson Brass is trusted by some of the most demanding precision rifle competitors in the country. Packaged 50 casings per box, this is brass built to perform at the highest level. Peterson Brass 6mm GT Brass Rifle Casings Box of 50 40076R