Peterson Cartridge Unprimed Rifle Brass Features The Peterson Cartridge Unprimed Rifle Brass is made from quality brass and formed specifically for the 6mm GT cartridge giving handloaders a reliable starting point for consistent ammunition. Each case is built to accept a small rifle primer and the small flash hole measures 0.060 inches in diameter noticeably smaller than the 0.080 inch flash hole found on Peterson s large rifle primer brass. Reloaders working with this brass need an undersized decapping pin to properly deprime the cases without damage. This attention to flash hole sizing is part of how Peterson maintains ignition consistency across every case in the batch. Peterson s match-grade standard runs through the entire production process from small batch manufacturing lines through a dedicated quality control department before the brass ever reaches a customer s bench. This 50-count box gives reloaders enough brass to work up and test a load without committing to a full case purchase upfront. Reloadable and built from brass these cases are designed to handle multiple firing and resizing cycles when properly maintained. Shooters chasing tighter groups and more consistent velocities out of their 6mm GT rifle will find this brass a dependable foundation for precision handloading. Peterson Cartridge Unprimed Rifle Brass Specifications Manufacturer: Peterson Cartridge Model: Unprimed Rifle Brass Caliber: 6mm GT Material: Brass Primer Size: Small Rifle Reloadable: Yes Rounds Per Box: 50 Available At: GrabAGun