I have to wonder if any of the above giving positive reviews have ever tried to use one of these with Accurate # 5 or H110? Because if that had they would not be giving the Junk a positive review. With a fine grained powder they leak horribly and will also jam solid. First time I tried one with Accurate #5 it jammed after 5 powder throws and the only way to clear it was to take it apart. Note, if it was due to a "bad Sample" make it 3 "bad Samples" because I had 3 because getting them set was so damned fiddly it actually made some send to purchase more.
What I did was toss them in the trash and purchase a RCBS Competition Powder Measure. Which doesn't leak or jam with a fine powder, it's very easy to set, and works perfectly.
I will also note that I'm a Manufacturing Engineer who has been using Statistical Process Control methods since 1982 so I have run 30 piece Capability Studies for every single powder I use. Truth, there is not one single volume based powder measure that is truly consistent. However the granule size and shape can have a huge influence on the Standard Deviation for thrown charges. If it looks like Unique in structure the SD will be 0.17 grains no matter what brand of measure you use. If it's fine like H110 or Accurate # 5 the Standard Deviation is 0.034 grains. If you are loading with a rifle powder like Varget use a trickler or electronic measure, because a SD of 0.4 allows too much variation in thrown charges.
Finally I will state that "runs" are meaningless, they are actually statistically predictable. If you don't believe that take your "run of 10" powder and throw 50 charges and weigh every one of them. All those "fliers" you see are not "fliers", they are part of the statistical sample group and why using Statistics is so useful.