Nosler® Trophy Grade™ .243 Winchester 85gr PTSP Ammo is a performance-enhanced centerfire hunting cartridge featuring Nosler’s proprietary Partition bullet design for maximum in-flight and terminal performance with devastating expansion at virtually all impact velocities. This ammo features a complex jacket design that makes use of two lead cores, separated by a monolithic partition. The front lead core is designed to expand and transfer massive shock and energy while the partition houses the rear lead core to maximize weight retention. Further, this ammo comes packed with clean-burning powders and propellants, loaded in premium brass casings for smooth, reliable performance you can depend on to drop that trophy buck you’ve been after all year.