I too have heard the "common wisdom/old shooters tale" about the plastic hopper Lyman and BP.    Lots of other powder measures also use Plastic Hoppers. Almost all exhibit some "static cling" in the hoppers.  
Maybe BP is easier to ignite than other propellents. maybe the Lyman's cast iron chassis is more likely "to spark".  
 Who REALLY knows of such an event?    I have NEVER heard of one actually blowing up--has anyone?    Mostly it seems to be a rumor based on a very slim potentiality--maybe.   
Brass or Alumnium hoppers might make a difference----the folk who sell them think so.  But wiping with an anti-static dryer sheet, or a grounding wire might do the same.   Personally I'd be more concerned about a lightning strike setting it off.   JMHO but we are at far greater risk from double charged cases that static blowups of our powder measures.    If anyone has any actual first hand knowledge of a measure explosion caused by static build up PLEASE let us know.

Go with the MVA, and use the medium size tube for powder.
Hard-wire ground your PM to a dedicated ground. This will eliminate static 'cling' of powder. NEVER tie into the house ground.
LG

i lined my lyman with aluminum foil 10+ years ago    works fine   cost .05   art

those photos by the guy deliberately TRYING to spark ignite BG---even 4F and then BP ground to dust like Swiss NullB should tell us something.  Lighting is also static electricity---and that probably would set off BP     but I just do not believe that the minute amount generated in a powder measure could cause an explosion.

even the "sparks" that a flintlock uses as ignition are actually white hot incandescent metal scraping from the face of the frizzed when the sharp edge of the flint rakes down it-----sure as hell not static sparks.

I'd still like to see some documented proof of static-cling in a powder measure hopper causing it to blow up.

Like most things in life the first thing to remember is the KISS principal (Keep It Simple Stupid). Keeping that in mind for most smokeless powders I use a Harrel click adjustable measure, for Black or 4759 I use a Belding and Mull With a micrometer tube. These two measures are repeatable and easy to use and set. .

40 Rod

I collect powder measures and have a lot of them, although not all.

I've got a question regarding the Bonanza powder measure. How many have used them? What are your thoughts about them. I though that this measure would come up in this discussion but, not so 

I had good friend in the 80's that held his in high esteem and I have 3 of them, mostly because of that and the Bonanza name and I got two of them very cheap.

I've never used any of them at the matches, only because I'm so bonded to my Redding.

Frank

This is the one that I'm talking about, on the left.

Frank

Boats,
Yes, I do, I have about 30 more but, I've been clean for at least a year now while I wait, patiently for my Hollywood measure, the last model that they made.

Frank