Thompson/Center® Bore Strike FTX Muzzleloader Bullets - .50 Caliber 290 Grain - 20 Pack - 9012RThe Thompson Center Bore Strike Muzzleloader Bullets are engineered to fit the bore of any . 50 caliber muzzleloader rifle. These bullets have been engineered without a sabot to seat quickly and easily for repeatable performance. The Bore Strike bullet incorporates an InterLock ring that helps retain bullet weight upon target impact that when coupled with a strengthened copper alloy jacket delivers maximum penetration and expansion for the ultimate