I would be leery of that bullet at the higher speeds of the Win Mag. I shoot them in my 6.5x55, which I have used to complete one shot kills on several mule deer, whitetails, pronghorn antelope, and hogs. However, my load pushes them at the more modest velocities that I believe they are designed for. In my otherwise limited experience with them at higher impact velocities I have seen them behave just like big Vmaxes. For that larger case, I would try Interbonds or the 140s you are considering.