Looks like it is missing the adjustable powder measure that goes in the hole below the hopper. 

Steve

The idea was that the sliding “Visible” chamber would present a constant weight of powder over the charge tube, reducing possible variations in the weight of charges as the level in the main reservoir dropped as loading progressed.

Other powder measures use baffles in the reservoir to reduce the effect of the powder weight change.

B&M measures could be had with four different charge tubes.  Standard and Magnum were a short and a long brass tube with a sliding steel insert, locked by a set screw.  Micrometer Standard and Magnum were the same sizes of tube but with the inserts threaded with a numerical dial at the bottom.  The Micrometer versions made it easier to record a precise number for a given charge than the others, which had more widely spaced numbers.

Just remove the pivoting nozzle from a muzzle-loading measure and insert into the B&M measure. Works just fine. You can get an exact measure with a trickler.

Smoke,
I use a MVA with my original B&M, yes they work.  It's a 1/2" diameter tube.
GT

Smoke wrote on Feb 14^th, 2025 at 12:23am:


If you read the feedback below the MVA measure the first one states he bought it for his original B&M and is very happy with it. So guessing it does fit and work well.

One thing that I learned here on this forum is to throw the handle three times for each charge to get very precise settlement and uniform charges.  I use mine primarily for black powder.  Tom

I have done 3 but usually only 2.  I use the to compress the powder after using a drop tube and pay attention the the arbitrary scale attached to this lee hand press and separate any load that is not consistent with the others.  1 or 2 out of 20 will show almost no compression.