The Hornady 25 Caliber Crimp-On Gas Checks are precision-made copper gas checks designed to enhance the performance of cast bullets for reloading applications. Each box contains 1000 gas checks that crimp securely to bullet bases.Hornady 25 Cal Crimp-On Gas Checks (SKU: HORN-7030)Made from high-quality copper construction1000 gas checks per boxProtects cast bullets from deformation and hot gasesReduces barrel fouling by decreasing lead buildupCrimps securely to bullet base for reliable performancePopular among hunters and shooters who reload their own ammunition these gas checks deliver the high quality and craftsmanship that Hornady is known for making them an essential component for enhanced cast bullet performance.