GB, in theory, yes it is just as dangerous as using a plastic measure for metalic cartridges. Most people, myself included, remove the hull, and charge with powder by hand, then procede as normal
I have been looking and asking if ANYONE had first or even second hand information of powder having been igmited from the use of a plastic powder measurem and have found no one.
There are some that have done a bit of experimenting, and couldn't ignite the charges with static electricity.
I THINK Calamity Jane, one of the contributers here, has done some work as well. It's been a while, but I think it was her that was talking about it about a year or so ago. Maybe she'll chime in here.
I for one am about ready to start using the powder hopper, and measure