At the heart of the .50-caliber Bore Driver FTX bullet from Hornady is a polymer base (not a sabot) that seals the bore to deliver maximum energy transfer and accuracy. Atop the base is the FTX bullet, featuring a rugged gilding metal jacket coupled with patented FlexTip technology that initiates expansion even at low velocities, enabling enhanced muzzleloader terminal performance. Its InterLock ring helps retain bullet weight upon impact and when coupled with a tough copper alloy jacket delivers deep penetration and expansion for on-game lethality. The Bore Driver FTX is designed for medium-size game. Retail: $36.99/Box of 20. Contact: www.hornady.com