Even the explanation needs an explanation.
When Selmer said, "NEVER fill a bottle-neck case with Blue Dot," he MEANT never fill it FULL of Blue Dot. Some folks might interpret "fill" as "put in the powder." Incorrect, but I've heard it used with that connotation. Slippery stuff, this English.
When properly loaded with Blue Dot, a case will normally be about half full. That being true, the safe procedure is (once again) dispense a weighed charge into the case. Check visually. Immediately seat a bullet.
