... you can actually get more accurate powder weights using the mechanical balance beam scales which can easily weight powder charges down to within 1/20th of a grain by putting the balance beam pointer BETWEEN the indicator lines ...
Unless you're loading for a well built "competition grade" rifle, have several other handloading details well under control and are shooting at long range, you're not going to be able to reliably demonstrate any advantage to going to that much trouble weighing powder charges.
