PPU 300 Winchester Magnum Rifle Reloading Brass - 50 Count - Prvi Partizan is offering a wide range of cartridge cases for hand loaders. These components use high quality raw materials. The cases are tested in a modern laboratory with stringent quality control during the entire production process. These characteristics will provide for the assembling of accurate and safe ammunition. The cartridge cases of PPU can be reloaded several times, without losing its quality. New, unprimed brass. This is not loaded ammunition. Bulk brass should be full-length sized, trimmed and chamfered before loading.