Benchrest guys load by volume - true. The main reason may not be what you think. It is out of necessity. They do a lot of their reloading at the shooting bench and wind will mess with any thing to do with weighing powder. They have their powder thrower already set for the powder and charge they are using, so they just set up and start throwing with out weighing or checking. Consistently is very important - so they use a powder that meters consistently. They usually use top of the line specialty throwers. Ones that the average reloader does not have. Once they have it set for the gun they use, they do not change it. I use an electronic measure/weighing unit. It is so easy to set up from one load to the next. I may be reloading 223's one day and then 357 the next, or 44 Mag or 30-30 or 444 Marlin, well you get the idea. All I have to do is punch in the weight I want and voila, I am starting to throw charges. No messing with the settings and then checking the weight, make another adjustment, check the weight; repeat until you get it set right. If you change cases, then you go through all of it again. Yep once it is set, it is quick if you are using a powder that it likes, but the electronic one is not much slower. While the machine is weighing the next charge, you check your powder level and seat a bullet and set it aside in a cartridge case. By about this time the next one is ready. It is simple, quick and I get pretty good results as far as shooting accuracy is concerned. Do I shoot benchrest? - nope. While I am fussy about my reloading and look for good results, I do not want to worry about the all the painful details benchrest folks go through. I do not weight cases and sort. I do not weigh bullets and sort. Those are just a couple of things they do, that I do not do.