This is a Winchester Ammunition Polymer Tip known as the Varmint HE chambered in 17 Winchester Super Magnum, model S17W25.
The new 17 Win Super Mag caliber ballistically exceeds the velocity" energy" trajectory and wind drift characteristics of all rimfire products currently available. The highest velocity rimfire cartridge in the world!
Features:
17 WSM
2,600 Feet per second
25 Grain Polymer Tip
Varmint HE
50 Rounds per box