If the .17 Hornady Magnum Rimfire (HMR) is your first choice for varmint ammo, then be prepared for an upset. Introducing the .17 Winchester Super Magnum (WSM), that uses a heavier 20gr bullet than the HMR but fires them nearly 20% faster and with about 65% more muzzle energy. Armed with the best .17 WSM ammo, […]