Content provided by Michiel Meyer, hosted with permission

Most powder dispenser’s works on volume. Because the volume is directly proportional to the weight of the powder, they can throw a consistent charge every time, without the need to weight each and every powder charge. I use an RCBS little dandy pistol powder measure. There are different sized rotors which can be inserted into the powder measure to accommodate different weights of powders. In my example I am using a number 7 rotor to throw a charge of 3.6gr of MS200. I also inspect each primed case to make absolute sure to eliminate a double and zero charge. Firing a round with zero powder in it can be just as dangerous as firing a double charged round. The primer alone will have enough power to eject the bullet from the case, causing a barrel obstruction. Because most powder dispensers work with volume, it important to note that different powders have different densities. MP200 for instance is more dense than MS200 and would require different size volume inserts for the same weight of powder. Using an electronic scale saves a bit of time, but is not necessarily more accurate than a beam-type scale.