Built to last, Lee Factory Rifle Crimp Dies improve reloading with less hassle and consistency for enhanced accuracy. These rifle crimp dies make it impossible to buckle the case as with regular roll crimp dies, and they make powder selection less critical. Even bullets which have no cannelure will shoot more accurately if crimped with this die. The sizer, which was made to fit most popular rifle calibers, sizes the cartridge while it's being crimped, so every round will positively chamber freely with factory-like dependability. Adjusting screw easily sets the desired amount of crimp. Plus, the crimper cannot be misadjusted to make a case mouth too small for proper head-space. Removes the hassle from reloading Won't buckle the case and reduces the importance of powder selection Improves accuracy, even of bullets with no cannelure Sizer fits most popular rifle calibers Sizes while crimping for factory-like chambering Screw makes adjusting the amount of crimp easy