Fiocchi Hyperformance 300 Winchester Magnum 180gr Swift Scirocco II Boat-Tail Spitzer Rifle Ammo - 20 Rounds - Swift Scirocco bonded is the perfect bullet design for today's fast, flat-shooting long range cartridges. Its secant ogive, 15 degree boat tail base and polymer tip create a sleek, aerodynamic profile that helps maintain down-range velocities and flat trajectories. The extra heavy tapering jacket wall with an internally bonded lead core provides structural integrity, reliable expansion and penetration with over 70% weight retention. Scirocco is a registered trademark of Swift Bullet Company.