The Winchester Super-X Rimfire Ammo 17 HMR 20 gr. Jacketed HP from Winchester delivers the proven Super-X series performance hunters and range shooters ask for, combining a 20-grain Hornady XTP hollow point bullet, brass casing, and a copper-alloy jacket to reduce barrel fouling while maximizing expansion on small game and varmints; with a muzzle velocity of 2375 fps and muzzle energy around 250 ft-lbs, this 17 HMR load is ideal for extended-range varmint control, target work that demands consistent ballistics, and precision plinking when dialing in a rimfire rifle. Youll notice consistent chamber pressure and excellent velocity thanks to clean-burning propellant, which supports repeatable group sizes and dependable point of impact across chronographed strings, and the jacketed hollow point profile promotes reliable terminal performance on coyotes, foxes, and ground squirrels without excessive pelt damage. As part of Winchesters long-running Super-X line, this round carries the brands emphasis on accuracy, dependable ignition, and field utility, making it an attractive option for varmint hunters, ranchers managing pests, and shooting enthusiasts looking for high-velocity 17 HMR ammo with controlled expansion and minimized fouling. Country of origin: United States.