I lucked into a Ruger 77/17 Mach 2. The walnut/blued, 20" sporter. It is deadly accurate on Alberts squirrels with head shots. Ammo has been available , and I'm stocked. I've done body hits on standing jackrabbits. They don't react, but fall over dead 5-10 seconds after the shot. I couldn't imagine shooting anything bigger. Anybody else have any results with this cartridge?