The Spit-Fire TMZ shares the same boattail design and 100 percent copper construction with the Spit-Fire MZ, but has a streamlined polymer tip for faster expansion.The higher ballistic coefficient aids exceptional long-range performance. It remains intact at extreme velocities, yet expands at only 1050 fps. The sabot design loads faster while retaining the tight gas seal that makes the MZ, Spit-Fire MZ and Spit-Fire TMZ the most accurate muzzleloader bullets on the market.