I don't use my scope for spotting when hunting, I always have 10x binoculars with me and sometimes use a spotting scope. I also use a rangefinder with a 7x magnification. Once I pick something out with the binos that I'm interested in shooting, I range it then get in a shooting position and look at it through the scope before I make the decision to disengage the safety and pull the trigger.
I don't know that there's any other way to do it. Am I the only one that waits for a good shot? This can take a few minutes. It just so happens that sometimes I can see detail through the scope that I couldn't see with the binos. Buttons on what looked like a doe, etc. I have shot all but one of my deer in low light conditions (<30 minutes of shooting light left).
Please don't load your rifle and run around the woods using your scope as binoculars to scan your surroundings - not only is that stupid but it would probably wear out your arms, even with a fieldcraft.