I use a Lee “perfect” powder measure to drop into the pan for my Redding scale and then trickle (RCBS) up to the desired weight of powder. That gets funneled into the case and on to the next case. After a block of cases is charged with powder, take a flashlight and check all of the cases to make sure that all have powder, and they all look about the same. Prevents squib rounds or occasional double charges when using light loads in larger cases.