Fiocchi Hyperformance 270 Winchester 150gr SST Rifle Ammo - 20 Rounds - Hyperformance utilizing only the best projectiles on the market, you can be assured of consistent performance and quality with every use. The tipped designs initiate consistent expansion while the core and jacket together provide superior weight retention by minimizing core-jacket separation. Flat shooting, it offers improved long-range ballistics to impart instant damage to tissue, bone, and vital organs on game from hogs and whitetail deer to elk and moose. SST is a registered trademark of Hornady.