The Scirocco Bonded bullet design features make Remington's Premier Scirocco line some of the most versatile and reliable big game ammunition offered today. The expansion-generating polymer tip and the boat tail base combine to defy air resistance at the front end, and reduce drag at the back. The progressively thickening, heavy-based, pure copper jacket is bonded to the lead core to preserve bullet integrity and retain over 75% of its weight at all velocities.