Most modern bullets use polymer tips, but polymer melts at 320-345 degrees Fahrenheit, while bullets can reach temperatures greater than 800 degrees during flight. To counter this, Hornady created the ELD-X hunting bullet with its Heat Shield Tip, which sports a melting point above 700 degrees and degrades far less, making for a more accurate bullet with a higher ballistic coefficient. The company then loaded it in its Hornady Precision Hunter ammo line.