below are some items I ran across searching movie prop sites. The red pointed 9mm bullet is from one of the Lethal Weapon movies. It was a tungsten bullet (actually aluminum). It was for sale and I bought a box (filled with a wood block) and a small framed display with photos from the movie and one of the cartridges. The others were either not for sale or had already been sold. The glass bullets were from a Zombie movie as I remember. The 43 BRM headstampp was referred to as a 9mm but who knows. I think the 45mm headstamp was associated with the fancy bullet that looks somewhat like a small jet engine. I found these in 2011 and haven’t looked since. I would like to have the case headstamped “umbrella 9mm” !!!
There is no end to this hobby.