Peterson Cartridge Unprimed Rifle Brass Features The Peterson Cartridge Unprimed Rifle Brass in .300 PRC is manufactured to a match-grade standard that Peterson maintains from their small batch production lines through final quality control inspection. That consistency matters directly to reloaders since uniform case dimensions and wall thickness translate into more consistent neck tension more uniform powder capacity and ultimately tighter groups downrange. The .300 PRC cartridge was introduced in 2018 with a .532 inch head diameter and a 30-degree shoulder and unlike older magnum rifle cartridges it uses no belt on the case. This beltless design simplifies case prep and headspacing compared to older belted magnum designs still common on the market. Built for large rifle primers this brass is fully reloadable and intended to pair with long heavy for caliber VLD target or hunting bullets that the .300 PRC was designed around. Fast twist rate barrels common to .300 PRC rifles take full advantage of these heavier bullets and starting with consistent Peterson brass helps reloaders extract maximum accuracy from that pairing. Each box contains 50 unprimed cases giving reloaders a practical starting quantity for load development or a dedicated match batch. For reloaders chasing precision rifle performance in .300 PRC Peterson s match-grade brass offers a dependable consistent foundation to build from. Peterson Cartridge Unprimed Rifle Brass Specifications Manufacturer: Peterson Cartridge Model: Unprimed Rifle Brass Caliber: .300 PRC Material: Brass Primer Size Type: Large Rifle Reloadable Case: Yes Rounds Per Box: 50 Available At: GrabAGun