From T/C:

The Shock Wave is a new spire point bullet with polymer tip specifically designed as a muzzleloading sabot bullet, not a conventional pistol bullet converted to a muzzleloading projectile. T/C's Shock Wave incorporates modern technology previously only applied to centerfire rifle bullets. The Shock Wave is as advanced as today's muzzleloaders and their propellants.

The polymer tip of the Shock Wave bullet does double duty; it increases the Ballistic Coefficient for sustained high velocity down range, and it punches into the pocket to open up the nose cone for fast expansion. The result; 3" less drop at 200 yards, and devastating energy at velocities between 1,000 ft/sec & 2,200 ft/second.

The Shock Wave has a harder lead core with walls interlocked with the jacket for maximum weight retention and expansion.