Well, I tend to load rather sizable batches of ammo, unless working up loads. When working up loads, I'll have prepped cases ahead of time - sized, primed and expanded. Then I'll load 5 or 6 at a time of various loads. These charges are generally weighed, usually by using Lee's dippers to get close, and tiny spoons to adjust the charge to get it right. I'll charge all cases, and the FINAL move is just to visually inspect cases for the right and uniform powder level height. If it's consistent, I'll then seat the bullets.
Normally, for larger batches, which are more usual, I size, expand and prime them in lots, usually of about 200-300 or so. Then I set my powder measure for the charge I want, and operate it with 3 knocks against the stops on the downstroke and again on the upstroke. I learned to do this long ago by testing the drops with a scale, and found it provides the best consistency of any method I could think of to try, especially with bulky or large grained powders. I even do it with ball, but that's just habit more than anything else. The knocks on the upstroke is to ensure that static doesn't let some grains stick inside the measure, and it knocks them loose - again contributing to consistency. After the tray of cases is charged, I inspect them in good light for the right and consistently uniform height in the cases. Any that vary are recharged and rechecked, then corked with bullets.
However, NO procedure is in itself any real insurance. It simply takes presence of mind and attention to detail to prevent kabooms, and I should know, due to my one single mistake that COULD have cost me big time. As the old timers used to say, "Once burnt, a lesson learnt." There really IS wisdom in that. I just hope you newbies don't have to learn that the way I did once. It really ain't much fun!