The Nosler Ballistic Tip Lead-Free (BTLF) is everything that varmint and predator hunters expect from a Ballistic Tip, in a lead-free design. The flat-based, lead-less bullet features Nosler's exclusive Fragmenting Copper Core Technology (patent pending) which exhibits immediate and rapid expansion, initiated by its metallic-colored polymer tip, at practical varmint shooting velocities of 1600 fps and above.