Hornady Double-Sided Universal Loading Block. The Universal Loading Block by Hornady is used with magnum 308 and 223 size case heads. This Hornady Gunsmith and Reloading Tool also works with Fast-Load Powder Measure Stand to reach every case in the block. This Gunsmith and Reloading Equipment is critical gear for any hand-loader. Specifications for Hornady Universal Loading Block 480040: Weight: .036 lbs. Fits: Magnum 308 and 223 Features of Hornady Universal Loading Block 480040: Loads large quantities of cases Double-sided Package Contents: Hornady Universal Loading Block 480040 Hornady Universal Loading Block