Rio Ammunition ST32HV75: Star Team Evo cartridges are manufactured with our own proprietary selection of components and exacting quality controls, making this top-level competition sports shooting cartridge the pinnacle of our research and development efforts. Through extensive testing, we have achieved a cartridge for sports shooting with excellent velocity, extremely reliable performance, and minimal recoil, and delivering excellent energies on target even at extreme distances. RIO is the leader in the manufacture of clay shooting cartridges throughout the world, endorsed by thousands of top competition shooters.