Powder measures are all over the place, especially the u-vue types. This is the only measure i use:
http://www.eabco.net/Thompson-Center...e_p_13724.html
Did a lot of testing of weighed charges. Should have used the time for a productive purpose. Any small increase in accuracy with weighed charges was not worth the trouble.
In the 60s and 70s i went to a lot of black powder shoots. Most contestants measured their powder with an open top measure. The measure was filled slightly over full and then "struck off" with a finger; no shaking, no tapping no nothing else.