Tight wall concentricity helps to ensure proper bullet seating in both the case and the chamber of your firearm. Higher concentricity also aids in a uniform release of the bullet on firing, for optimal velocity and accuracy. Benchrest shooters have long known that uniform case wall thickness is vital to accuracy. Hornady manufacture to extremely tight tolerances to ensure this critical element is as consistent as possible. Hornady treats brass as the foundation for an accurate cartridge, not a commodity. Because we take greater care in its creation, you will get more reloads from Hornady brass. Every single Hornady case, regardless of the lot in which it was produced, is virtually identical to other Hornady cases in the same caliber. For you, this means consistent pressures, velocity, and accuracy every time. Specifications for Hornady Unprimed Rifle Cartridge Cases: Manufacturer: Hornady Gun Type: Rifle Primed: No Finish: Unprimed Quantity: 1 Fabric/Material: Brass Case Material: Brass Features of Hornady Rifle Cartridge Cases, Unprimed Tight wall concentricity Uniform case wall thickness More reloads per case Consistent weight and capacity Package Contents: Hornady Rifle Cartridge Cases, Unprimed