Hornady Unprimed Brass Cases - .338 Lapua Magnum (20 Pack)Ensuring Tight Wall Concentricity Achieving optimal bullet seating within both the case and firearm chamber is crucial for firearm performance. Tight wall concentricity plays a pivotal role in this process, facilitating uniform bullet release upon firing. This results in enhanced velocity and accuracy, a key consideration for shooters seeking precision. Emphasizing Uniform Case Wall Thickness Recognized by bench rest shooters for its significance in