Thanks that is interesting and helpful!
Do you have the respective weights of the jacket and the core handy?
I don't. And that was the original reason I acquired some actual bullets. I was trying to determine if CE567 and CE569:
came from more than one bullet by trying to determine whether the mass of the copper exceeded the mass of copper in a single bullet. I thought that the total mass of the copper in those two fragments (CE567=289 mg; CE569=1361 mg) might exceed the amount of copper in one bullet. I don't think it does and I think both may well have come from the same bullet.
If I feel inclined I may get my blow torch out and heat up one of my bullets and see if I can determine the mass of the lead and copper separately.