I've had the 602, cz550 and m70 se. 550 Grip was to fat and gun to heavy. Also the action is way bigger Than needed for a 458wm.either punch it to 458 Lott or get a normal size action. I liked the m70 best of the 3.
I think that's the reasons why it fit me so well, I have pretty big mits. Model 70's all seem too small to me. And I often carry around a 11 pound 300WM so the weight doesn't bother me either. Thanks for the input though!