A couple thoughts - magnification and variable power for hunting. My experience was mostly on White Tail deer in Saskatchewan - often pushed out of a bluff - so many times taken "on the run".
I used to have a 2-7 power scope on my 308 Win. That scope lived for a while on my 7x57. Was changed to a fixed 6X. I had noticed that when deer bust out of bush, rifle came up and I was shooting - I do not recall EVER adjusting the magnification for a shot at a deer - certainly, there is NO TIME to turn DOWN the power - I tended to fire with whatever that variable power was set at, at the time. Others may have different experience, or more discipline than I had for that. Over the years, I took and saw taken many head of game with fixed 3X, 4X and 6X scopes - I am just not convinced that the disadvantages of variable power scopes - especially then - were worth the trade-off over fixed power.
Is a thing about how much magnification is needed - for HUNTING. I fired many 3 and 5 shot groups at 100 yards, from sandbags - under 1" - with a fixed Weaver 3X scope. You can read of Phil Shoemaker dropping a client's wounded moose at 500 or 600 yards (?) with a 2 1/2 power scope. My Uncle told me in Canadian Army during WWII, they would fire at a target marker that was about 12" wide - at 400 yards (?), with iron sights - I recall him mentioning how easy that was, since the target, to his eye, was about exactly the same width as their front sight post. And is still today target shooters for "full bore" who will fire and get groups at 1,000 yards - laying prone, no rests and using double aperture sights - no scopes at all. I do not recall being able to shoot "groups" at game, or to get "ranging" or "sighting in" shots - was pretty much all about that first cold barrel shot - where does it go compared to the sights - the rest of the shooting tended to be just practice - maybe to get better at breaking the trigger without changing the sight picture. But, there was one White Tail doe that I got - the only one that I remember taken with a round from the magazine - perhaps the fourth round fired at her - all the rest taken were at least hit with the first shot - and I did empty the rifle many times!