That is a helpful thread on the cartridge collectors page, thanks for sharing!
I have twenty "S3" headstamped rounds of 9mm Luger ammunition in a case I'm currently working. The bullets look a lot like a Liberty Ammunition bullet (nickel plated solid copper hollowpoint), found this on their website
https://libertyammo.com/ultra-lights/ . I did weigh one of the cartridges, I got 92.2 grains for the total weight.