SIG SAUER Rifle Brass .243 Winchester Non-Primed 50 Brass/Bag. This small but significant component makes up the casing of a loaded round and is necessary for reloading. However most people don't think beyond the casing of a loaded round and consider loading the casing of a loaded round. Whereas this is the case for a reloading casing a prime casing is what brings a casing to a cartridge's terminal performance. For this reason Sig Sauer produces both primed and unprimed brass. But both are extremely important for reloaders to consider when deciding what brass to use for reloading. Specifications for SIG SAUER .243 Winchester Non-Primed Pistol Brass: Manufacturer: SIG SAUER Gun Type: Rifle Caliber: .243 Winchester Primed: No Fabric/Material: Brass Brass Quantity: 50 Piece Package Type: Bag Package Contents: SIG SAUER .243 Winchester Non-Primed Pistol Brass SIG SAUER Infinite Guarantee SIG SAUER BR2006: Rifle Brass .243 Winchester Non-Primed 50 Brass/Bag