Hornady Superformance 7X64 140 Gr Gmx SpfiSuperformance® International ammunition is loaded with Hornady® GMX® bullets for the ultimate in performance, no matter what the game.Superformance® Propellants are the heart of Superformance® International ammunition and usher in a new era of performance.Like all Hornady® ammunition, our Superformance® International rounds use the highest quality cases and primers available. Consistent components translate to consistent shooting in the field.