I love the 3 position safety on my M70s. Walking/sneaking thru the woods, the safety is all the way back in case the bolt get lifted going thru brush. When I am on stand, the safety is in the middle position as I can sneak it off safe quietly, with one less click. Obviously safety in middle position when loading or unloading round in the chamber.

I know 2 guys who had problems with their Walker triggers so I changed it out to a Timney trigger with their 3 function safety (I believe designed by Melvin Forbes). This safety locks the bolt down on safe. It looks like a 2 position safety but to unload, with the safety back and on, you push down on the safety lever and the bolt is unlocked allowing one to unload the rifle without taking the safety off.