Thompson Center Bore Driver Features The Thompson Center Arms Bore Driver replaces a traditional sabot with a dedicated polymer base which seals the bore to deliver maximum energy transfer and improved accuracy downrange. At ignition the base s post swells in diameter for better torque engagement from inside the bullet while centering petals grip the bullet s boattail and the skirt engages the rifling to maximize energy transmission. This design loads fast and easily seating quickly for consistent shot-after-shot performance without the extra step of handling a separate sabot. Topping the base is a genuine Hornady ELD-X bullet already proven in centerfire rifle hunting applications. The ELD-X bullet s polymer tip drives into the lead core like a wedge upon impact initiating controlled rapid expansion for dependable terminal performance. An InterLock ring helps retain bullet weight on impact and combined with a tough copper alloy jacket it delivers the deep penetration and expansion hunters need for ethical effective shot placement. At 340 grains the Bore Driver carries enough mass for reliable performance on medium to large game at typical muzzleloader ranges. Packaged 12 to a box the Thompson Center Bore Driver ELD-X .50 caliber bullet is available for sale at GrabAGun for muzzleloader hunters who want their one shot to count. Thompson Center Bore Driver Specifications Manufacturer: Thompson Center Model: Bore Driver Caliber: .50 Caliber Bullet Diameter: .400 Bullet Weight: 340 gr Bullet Type: ELD-X Quantity: 12-Count Available At: GrabAGun