I'm new to the idea of long range shooting but it fits my hips and knees. After around a 10 yr absence to reloading I just re-equipped myself and am excited at the new advancements in technology. Questions: You loaders that take this seriously are you content and confident in the electronic powder scales and their inherent +/- load variations? How many grains between load sizes is significant? 1/2 grain increments when fine tuning your tack drives, or less?