Millions of successful hunts have proven the accuracy and deadly knockdown power of the famous Hornady InterLock, bullets that is loaded into every Hornady Custom rifle cartridge. Each cartridge is loaded to ensure optimal pressure, velocity and consistency, from lot to lot. Much of the brass is made by Hornady, the rest carefully selected for reliable feeding, corrosion resistance, hardness and the ability to withstand maximum chamber pressure. Like the powder, each primer is carefully matched to individual loads, and specially selected tor their ability to quickly, completely and reliably ignite the powder charge.