I do realize that Tubbs uses a Prometheus now a days. But the video I mentioned was older and before it existed. He was metering charges with a normal powder measure.
He also went onto say that people fixate over the exact same powder weight every round. While it is important, he stated that as long as you're loading in the accuracy node, it's not as important as many other variables... like uniform primer pockets and primer pocket holes and concentricity, etc.
I'm just paraphrasing what he said. It's not necessarily my opinion too on all things. And obviously he uses a Prometheus now, so it does matter to him to a point.