In my long haul of trial and error..finding that 10 power on scopes is the magical magnification in my case of a magnum springer. Steadier reticle and easier to plant a cheek weld with a forgiving eye relief. Ive been exclusively using 12 power and finding the reticle dances way too much .10 power allows you to stay on target and accuracy improves .this is subjective..as I realize field target enthusiasts use higher magnification. I'm strictly using this as a rule of thumb for minute of squirrel or rabbit at 50 to 70 ..The stats for my setup are this ..Barracuda hunter extremes 18.2 grain at 700 fps.10x on hawke airmax .repeatable accuracy .oh the gun is a Diana 350 pro compact in .22.shot off sticks as said ranges .