Varmints beware—the .17 WSM is here. The .17 Winchester Super Magnum is the newest technology in the surging market of magnum rimfire cartridges. Sure, it’s a .17 caliber bullet, but that tiny projectile delivers some nasty results on small game out to 300 yards.
At a whopping 3,000 fps with a 20 grain bullet, the .17 WSM is a laser beam compared to 2,400 fps with a similar weight projectile from its .17 HMR counterpart. When launching heavier 25 grain bullets with 375 foot-pounts of energy, the .17 WSM outperforms the HMR by half.
The editors at G&A explored the ballistic performance of this hot new round with a classic two liter penetration test.