Hands down the .300 Win mag. Always wanted one and when I went to get one I came home with a 8mm Remington mag. Love the 8mm but that is as close as I ever got to the .300 win mag.
I have both. Only had 1, - 8 but have had several 300 WMs.
The 8 is more gun than the 300 but I like the 300 better for a couple of reasons. There is less recoil and there are many more bullet choices.