For "up to certain yardages" it is very common practice. Beyond certain yardages one really needs an in hand calculator for day to day atmosperic conditions. I use a range card on my stock as well as one on the inside of my scope's rear flip up cover so I dont even have to tilt my head. My eyes are always forward.
Long range shooting is a process that ends with a result. Once you start to focus on the result (where the shot goes, how big the group is, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.