I thought this might be of interest to those with a lathe and mill. Many years ago I picked up some brass tubing, 2" od and used a piece to replace the hopper on a Lyman 55 measure. Back then I just used a dremmel to grind out the radius that holds the plastic hopper in. Since then I have added to my shop and when I picked up a Lyman measure without a hopper I got to figuring on a way to hold the measure to open it up to hold the new hopper.   
I figured I would turn an arbor to hold the measure and mount it in the chuck on my rotary table. That would give me stability in one direction and if I clamped the bottom to an angle plate it would hold it in the other direction. I figured as long as the cuts were light things would be ok. I was right and it worked out well. I do have limited vertical space with my mill, its a small one but it still got the job done. I only opened up the diameter by .005 a pass and it ended up being a pretty easy job. 
The pics tell pretty much the rest of the story. Maybe this will help someone else out with a bad hopper.
Sam

MIne was the press fit. If you look close at the top  pic you can kind of make out the radius ring that that held the hopper in. I just bored it out enough to take that ring out and a bit more. The tool height above the part is about as much clearance as I have on the mill with that set up. The threaded hopper would be the same process but maybe with a little less material to remove. Judging from the chips, the measure body is cast iron as the chips came off as dust. 
The mounting stud was a piece of 1 1/4 aluminum rod. The area inside of the measure was turned to just fit into the measure. approx .998". With light cuts nothing moved and all went well. My down feed is all by hand and feel as my mill has no power feed in any direction. The extra clearance between the measure and the brass tube will easily be taken up by some epoxy. Any excess that slops out can be easily cleaned up with rubbing alcohol. 
Sam

For a short time either Buffalo Arms or Track of the Wolf offered a brass replacement reservoir that was threaded for the earlier Lyman 55s, one of which I happened to have.  It’s a pretty tall tube and I believe it will hold well over a pound of BP.  I’ve thought of putting my Culver clone micrometer rotor on it, but hate the thought of having to clean it after every use.  I find BP fouls my brass rotors in iron powder measures much worse and more quickly than smokeless. 

On the topic of brass replacement reservoirs, I had both a Little Dandy and a (Lyman) Accu Measure whose plastic reservoirs had become damaged.  Just went to an old fashioned plumbing supply company and found nickel plated brass drain pipe of the proper size and repaired them with a classy look! 

Froggie