RFB headstamped Blanks-9x19

Thought these two boxes were interesting. I picked them up from a company that supplies guns and blanks for movies (Saving Private Ryan, Terminator, Star Wars, etc). Note that there are two distinct blanks. The blank with the red pa is for “Headshot” which I assume is close up use on a person and only has 1.2gr of Bullseye powder compared to the 8gr in the other blank.

Does anybody know of any other headstamps by Range Facilities (Burnham) Ltd.???