If you going in .5 increments, unless your really lucky you won't find the sweet spot. I shoot alot of precision and have witnessed my rounds vertically stringing with just a .1 change.
Find your ball park load using .5 increments and then narrow your loads down to .1 increments once your satisfied. Pay close attention to the stringing of your shots and how they move from left to right in between each string of loads.
It will take more loads but i feel it's completely necessary if your serious about finding what your rifle likes. Of course my ProChrono helps too