Youcertainly CAN set a regular powder measure to throw a specific VOLUME of black powder or aBP substitute. (The scale on a measure may be calibrated in grains, but it actually measures powders, smokeless or otherwise, by VOLUME!!) However, I would NOT use one that had any iron, steel, or plastic components for such a purpose. This is due tothe possibility, however remote, that such a measure could cause a spark or a buildup of static electricity in the plastic hopper, that would ignite the powder in the hopper.

I believe there are powder measures that are made specifically for measuring BP out of brass parts. I think Lyman made, or may still make, a No. 55 measure frombrass for this purpose.....

From a Guns Magazine Feb. 2003 article by Jim Gardner:

Until recently, I measured my black powder charges using a dipper, then poured them through a long drop tube. The process produced accurate ammunition, but was painfully slow.

"This all ended when I acquired a new Lyman No. 55 "Classic" powder measure. The Classic is adapted to both smokeless and black powder use. In addition, an optional 24-inch drop tube attaches directly to the measure.
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[/align]The principle difference between the No. 55, and the No. 55 Classic, is the use of a non-sparking brass insert (in which the rotor revolves) and a hopper made of aluminum to avoid static electricity buildup. The hopper will easily hold one pound of powder, great for loading those cavernous .45-120s.
I was pleased to see this brand new Lyman measure is just as nicely made as my 30-year-old specimen. If you need a measure for smokeless or black powder use, you can't go wrong with the good old No. 55."