Winchester Varmint LF .17 HMR 15.5 gr NTX Rimfire Ammo - 50/box is part of the Varmint LF (Lead Free) line from Winchester a brand known for its excellence performance and dependability. This bullet includes noncorrosive priming as well as clean burning powder for more effective results as well as ease of use. The .17 HMR also offers high accuracy making it perfect for shooting varmints even from slightly longer distances. The bullet itself has a polymer tip and is a jacketed hollow point. The design gives this ammo the ability to reach 2550 feet per second one of the highest velocities you will find.