A common debate is centered around the inherent accuracy of electronic vs beam scales. It’s this authors opinion that both types of scales have the potential to be acceptably accurate for handloading at the highest levels, but it is possible that either type of scales can have defects/problems which prevent them from operating at their potential. When operating scales of any type, it’s important to pay close attention to the environment. This includes insuring the scale is placed on a flat, level and sturdy surface. Also, make sure the scale is not exposed to air currents from fans, vents, or open windows because that will affect the consistency of the scales measurements. Finally, be mindful of how the scale is oriented in relation to your line of sight. If you have a beam scale on a desktop surface that’s just above your lap, it will be difficult to get at eye level with the needle to see when the beam indicates ‘zero’.
As stated previously, the use of powder measurers should be confined to applications where you’re not trying to minimize muzzle velocity variation as in precision long range shooting. Ball powder, being more finely granulated, is known to meter more consistently than the larger granules such as stick powder.