17 WSM – 20 Gr Polymer Tip – Winchester Varmint HV (S17W20) – 500 Rounds

The 17 Winchester Super Magnum is the fastest commercial rimfire cartridge, and the Varmint HV load is the speed king of the line. This listing is Winchester Varmint HV 17 WSM 20 grain polymer tip ammo, MPN S17W20, sold as 500 rounds. It is built for varmint hunters who want rimfire economy with near-centerfire reach.

Winchester rates this load at 3,000 fps with 400 ft-lbs of muzzle energy, far more than the 17 HMR. The polymer-tipped bullet improves ballistic coefficient and starts rapid expansion and fragmentation on small animals. That gives prairie dog, groundhog, and fox hunters a flatter trajectory and less wind drift than other rimfires, which stretches practical range. This is a varmint load, not designed for deer or larger game.

This ammunition fits rifles chambered in 17 Winchester Super Magnum, including the Savage B-Mag, Ruger 77/17 in 17 WSM, and Browning T-Bolt in 17 WSM. A common question is whether 17 WSM and 17 HMR are interchangeable. They are not. The 17 WSM uses a larger case based on a nail gun blank, and it will not chamber in a 17 HMR. Another common question is whether 17 WSM is legal for coyotes. It is a rimfire, and some states do not allow rimfire for certain predators or furbearers, so check your state regulations.

Winchester S17W20 is new production ammunition, not reloads, made in the USA. It uses rimfire priming in brass cases and cannot be reloaded. This listing ships as 10 boxes of 50 rounds for 500 rounds total from one lot. Staying on one lot preserves your zero at the longer distances this cartridge can reach, where small changes show up quickly. Record your drops at 100, 150, and 200 yards, and confirm them on a calm day before heading out. 17 WSM ammunition is less common than 17 HMR, so keeping a full supply on hand prevents gaps during the season when shelves run thin.