i seriously doubt that. hollyweird is well known for their ignorance in firearms.
--hell how many stars have been killed by blanks? at least two, one stuck a revolver to his head and fired and the other was killed when a revolver firing blanks had a bullet lodged in the barrel. this revolver had been used in several films --fired many many times with blanks --yet somehow after all these films no one ever checked the barrel for obstructions???
besides most of the times the weapons firing is FX added after the shoot.
while i had minis i had quite a few fuck-ups with them and i was not firing blanks either. i don't know of any arm that fires blanks better than live rounds.
blanks are even more prone to jamming from what i have seen with the m16s,m4s m60s, 249s and so on.
my guess is running a mini with blanks would be some what interesting.
most weapons fire being FX added to the film-- you really don't know what your seeing on tv and the movies.
i certainly wouldn't give any credence to hollywood for how good anything firearms related is.
in fact hollywood is the best place to look for wrong information.