If your goal is precision target shooting, volumetric powder measures are not going to give you the repeatability that you need. They are quick and good enough for loading pistol or rifle cartridges where production rate is more important than precision. They certainly have their place on a reloading bench. I use a volumetric meter on my Lee turret press for handgun ammo.
One method you can try is to use your Uniflow to throw most of the desired powder charge and then trickle in the remaining fraction of a grain manually on a scale. That may save you some time.
I ended up investing in a RCBS Chargemaster Lite when I realized how much time I was spending weighing powder onto a scale.
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