The Winchester Varmint .17 WSM Rimfire Rifle Ammunition is considered some of the most efficient ammunition for coyote, prairie dog, and varmint hunting. The accuracy is undeniably precise and effortless. This ammo is popularly considered the best for long-range shooting. The bullets are coated with polymer at the tip and are intentionally ensconced with charcoal color to provide explosion as the bullet reaches the target.